`rustup install` behind a corporate proxy fails with TLS handshake eof

[muja]

Verification

• I searched for recent similar issues at https://github.com/rust-lang/rustup/issues?q=is%3Aissue+is%3Aopen%2Cclosed and found no duplicates.
• I am on the latest version of Rustup according to https://github.com/rust-lang/rustup/tags and am still able to reproduce my issue.

Problem

When running rustup behind a corporate proxy (without RUSTUP_USE_CURL=1) this error is produced:

❯ https_proxy=http://our.corporate.proxy:8080 rustup -v install beta     
debug: read metadata version: '12'
debug: installing toolchain 'beta-x86_64-unknown-linux-gnu'
debug: toolchain directory: '/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu'
info: syncing channel updates for 'beta-x86_64-unknown-linux-gnu'
debug: creating temp file: /home/user/.rustup/tmp/fr9g80t5bbku20gz_file
debug: downloading file from: 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256'
debug: downloading with reqwest
debug: removing toolchain directory: '/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu'
error: could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/fr9g80t5bbku20gz_file'

Caused by:
    0: failed to make network request
    1: error sending request for url (https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256)
    2: client error (Connect)
    3: tls handshake eof

Dropping the protocol from the environment variable makes no difference. Adding RUSTUP_USE_CURL=1 fixes it, but apparently that's deprecated.

One thing that may be relevant is that the corporate proxy is some kind of Fortinet Proxy and does not support the zstd encoding, although it doesn't seem that the site tries to send it, even if advertised in Accept-Encoding header:

❯ https_proxy=http://our.corporate.proxy:8080 curl -H'Accept-Encoding: gzip, deflate, br, zstd' https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256 -i  
HTTP/1.1 200 Connection established
Proxy-Agent: Fortinet-Proxy/1.0

HTTP/1.1 200 OK
Connection: keep-alive
Content-Length: 89
x-amz-id-2: mXql6d23ngh+97LxTHAn6Xi9gwAKFzEF+Nav+Dt2XiM5MqhadLZhXUFx03fDBML0wVNr/ViEskSezEkcmUE25w==
x-amz-request-id: BTXNY0ZSHN2XNP9X
x-amz-storage-class: INTELLIGENT_TIERING
x-amz-server-side-encryption: AES256
x-amz-version-id: GU3vQbCUgbROXsRF6.3A_9u1QAIw8NjY
X-Served-By: cache-mxp6978-MXP
X-Cache: HIT
X-Cache-Hits: 1
X-Timer: S1745567961.974974,VS0,VE1
Last-Modified: Sun, 20 Apr 2025 02:19:51 GMT
ETag: "d3aaf2159800ee081e95612b2de0f7c3"
Content-Type: binary/octet-stream
Server: AmazonS3
Accept-Ranges: bytes
Date: Fri, 25 Apr 2025 07:59:20 GMT
Via: 1.1 varnish
Age: 5

dcf745f4f5daf2f9f5285edc4d2eb37f0a62297933c20c1727e15fa6edf5baa0  channel-rust-beta.toml

Steps

Output with RUSTUP_LOG=TRACE:

❯ RUSTUP_LOG=trace https_proxy=http://our.corporate.proxy:8080 rustup -v install beta
2025-04-25T08:04:14.263604Z DEBUG run_rustup:run_rustup_inner:main:set_globals: rustup::cli::common: read metadata version: '12' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" current_dir="/projects" quiet=false process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true })
2025-04-25T08:04:14.264681Z DEBUG run_rustup:run_rustup_inner:main:install:install: rustup::cli::common: installing toolchain 'beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]"
2025-04-25T08:04:14.264696Z DEBUG run_rustup:run_rustup_inner:main:install:install: rustup::cli::common: toolchain directory: '/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]"
2025-04-25T08:04:14.264747Z  INFO run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: syncing channel updates for 'beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.264819Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: creating temp file: /home/user/.rustup/tmp/yabreatzi_qioeza_file process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.264883Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: downloading file from: 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.264894Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: downloading with reqwest process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.265034Z TRACE run_rustup:run_rustup_inner:main:install:install:update_from_dist: hyper_util::client::legacy::connect::http: Http::connect; scheme=Some("http"), host=Some("our.corporate.proxy"), port=Some(Port(8080)) process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.287246Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: hyper_util::client::legacy::connect::http: connecting to 10.176.85.66:8080 process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.292956Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: hyper_util::client::legacy::connect::http: connected to 10.176.85.66:8080 process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.321579Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: removing toolchain directory: '/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.321640Z TRACE run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::dist: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/yabreatzi_qioeza_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T08:04:14.321680Z TRACE run_rustup:run_rustup_inner:main:install:install: rustup::install: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/yabreatzi_qioeza_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]"
2025-04-25T08:04:14.321712Z TRACE run_rustup:run_rustup_inner:main:install: rustup::toolchain::distributable: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/yabreatzi_qioeza_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/projects" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"rustup\", \"-v\", \"install\", \"beta\"]"
2025-04-25T08:04:14.321751Z TRACE run_rustup:run_rustup_inner: rustup_init: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/yabreatzi_qioeza_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> }
2025-04-25T08:04:14.321788Z ERROR rustup::cli::common: could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/yabreatzi_qioeza_file'

Caused by:
    0: failed to make network request
    1: error sending request for url (https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256)
    2: client error (Connect)
    3: tls handshake eof

Possible Solution(s)

No response

Notes

No response

Rustup version

❯ rustup --version
rustup 1.28.1 (f9edccde0 2025-03-05)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.88.0-nightly (a15cce269 2025-04-17)`

Installed toolchains

❯ rustup show
Default host: x86_64-unknown-linux-gnu
rustup home:  /home/user/.rustup

installed toolchains
--------------------
stable-x86_64-unknown-linux-gnu
nightly-x86_64-unknown-linux-gnu (active, default)

active toolchain
----------------
name: nightly-x86_64-unknown-linux-gnu
active because: it's the default toolchain
installed targets:
  x86_64-unknown-linux-gnu

OS version

❯ cat /etc/*release
NAME="Red Hat Enterprise Linux"
VERSION="9.5 (Plow)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="9.5"
PLATFORM_ID="platform:el9"
PRETTY_NAME="Red Hat Enterprise Linux 9.5 (Plow)"
ANSI_COLOR="0;31"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:redhat:enterprise_linux:9::baseos"
HOME_URL="https://www.redhat.com/"
DOCUMENTATION_URL="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9"
BUG_REPORT_URL="https://issues.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 9"
REDHAT_BUGZILLA_PRODUCT_VERSION=9.5
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="9.5"
Red Hat Enterprise Linux release 9.5 (Plow)
Red Hat Enterprise Linux release 9.5 (Plow)

[rami3l]

cc @djc since the above log looks related to the download/TLS backend.

[djc]

@muja thanks for the detailed report. Could you try this with a build from #4307?

[muja]

Sure, some instructions would be appreciated, a cargo build didn't produce a binary:

rustup on  download-errors is 📦 v1.28.2 via 🦀 v1.88.0-nightly 
❯ ls target/debug/
build  deps  examples  incremental

[rami3l]

Sure, some instructions would be appreciated

@muja Can you see the download links in https://github.com/rust-lang/rustup/actions/runs/14660975811?pr=4307?

[djc]

Works for me:

djc-2021 download-errors rustup $ cargo clean && cargo build
     Removed 7820 files, 1.6GiB total
   Compiling proc-macro2 v1.0.95
   .
   .
   .
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.61s
djc-2021 download-errors rustup $ ls -l target/debug 
drwxr-xr-x    - djc 25 Apr 11:18 build
drwxr-xr-x    - djc 25 Apr 11:19 deps
drwxr-xr-x    - djc 25 Apr 11:18 examples
drwxr-xr-x    - djc 25 Apr 11:19 incremental
.rw-r--r-- 2.5k djc 25 Apr 11:19 librustup.d
.rw-r--r--  39M djc 25 Apr 11:19 librustup.rlib
.rwxr-xr-x  40M djc 25 Apr 11:19 rustup-init
.rw-r--r-- 2.6k djc 25 Apr 11:19 rustup-init.d

You'll want to use ln -s target/debug/rustup-init target/debug/rustup and then invoke ./target/debug/rustup directly instead of using cargo run, though.

[ctz]

tls handshake eof originates from tokio-rustls, and signifies the connection was closed at the TCP level unexpectedly during the TLS handshake. Unfortunately I think that means there are no avenues for further debugging at the client end.

[muja]

Sure, some instructions would be appreciated

@muja Can you see the download links in https://github.com/rust-lang/rustup/actions/runs/14660975811?pr=4307?

Yeah that works. The logs with the new build:

❯ RUSTUP_LOG=trace ./rustup install beta
2025-04-25T09:27:35.802458Z DEBUG run_rustup:run_rustup_inner:main:set_globals: rustup::cli::common: read metadata version: '12' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" current_dir="/tmp/tmp.GMa5EgKV42/rustup" quiet=false process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true })
2025-04-25T09:27:35.803662Z DEBUG run_rustup:run_rustup_inner:main:install:install: rustup::cli::common: installing toolchain 'beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]"
2025-04-25T09:27:35.803677Z DEBUG run_rustup:run_rustup_inner:main:install:install: rustup::cli::common: toolchain directory: '/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]"
2025-04-25T09:27:35.803753Z  INFO run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: syncing channel updates for 'beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:35.803821Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: creating temp file: /home/user/.rustup/tmp/z57wgwaqjemppfbu_file process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:35.803886Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: downloading file from: 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:35.803897Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: downloading with reqwest process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:35.804052Z TRACE run_rustup:run_rustup_inner:main:install:install:update_from_dist: hyper_util::client::legacy::connect::http: Http::connect; scheme=Some("http"), host=Some("our.corpoate.proxy"), port=Some(Port(8080)) process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:35.808679Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: hyper_util::client::legacy::connect::http: connecting to 10.176.85.20:8080 process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:35.810588Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: hyper_util::client::legacy::connect::http: connected to 10.176.85.20:8080 process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:36.003257Z ERROR run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::download::reqwest_be: failed to download file error=error sending request for url (https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256) process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:36.003349Z DEBUG run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::cli::common: removing toolchain directory: '/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:36.003371Z TRACE run_rustup:run_rustup_inner:main:install:install:update_from_dist: rustup::dist: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/z57wgwaqjemppfbu_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]" profile="Default" prefix="/home/user/.rustup/toolchains/beta-x86_64-unknown-linux-gnu"
2025-04-25T09:27:36.003385Z TRACE run_rustup:run_rustup_inner:main:install:install: rustup::install: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/z57wgwaqjemppfbu_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]"
2025-04-25T09:27:36.003395Z TRACE run_rustup:run_rustup_inner:main:install: rustup::toolchain::distributable: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/z57wgwaqjemppfbu_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } current_dir="/tmp/tmp.GMa5EgKV42/rustup" process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } args="[\"./rustup\", \"install\", \"beta\"]"
2025-04-25T09:27:36.003411Z TRACE run_rustup:run_rustup_inner: rustup_init: error=could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/z57wgwaqjemppfbu_file' process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> } process=OsProcess(OsProcess { stderr_is_a_tty: true, stdout_is_a_tty: true }) console_filter=Handle { inner: (Weak), _s: PhantomData<fn(tracing_subscriber::registry::sharded::Registry)> }
2025-04-25T09:27:36.003425Z ERROR rustup::cli::common: could not download file from 'https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256' to '/home/user/.rustup/tmp/z57wgwaqjemppfbu_file': failed to make network request: error sending request for url (https://static.rust-lang.org/dist/channel-rust-beta.toml.sha256): client error (Connect): tls handshake eof

FWIW the reason cargo build didn't produce any binaries is because it couldn't find an OPENSSL directory, I completely missed that. No idea if that is related or belongs here, but here is the output:

warning: openssl-sys@0.9.107: Could not find directory of OpenSSL installation, and this `-sys` crate cannot proceed without this knowledge. If OpenSSL is installed and this crate had trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the compilation process. See stderr section below for further information.
error: failed to run custom build command for `openssl-sys v0.9.107`

Caused by:
  process didn't exit successfully: `/tmp/tmp.GMa5EgKV42/rustup/target/debug/build/openssl-sys-d6ce3b6d82c3b015/build-script-main` (exit status: 101)
  --- stdout
  cargo:rustc-check-cfg=cfg(osslconf, values("OPENSSL_NO_OCB", "OPENSSL_NO_SM4", "OPENSSL_NO_SEED", "OPENSSL_NO_CHACHA", "OPENSSL_NO_CAST", "OPENSSL_NO_IDEA", "OPENSSL_NO_CAMELLIA", "OPENSSL_NO_RC4", "OPENSSL_NO_BF", "OPENSSL_NO_PSK", "OPENSSL_NO_DEPRECATED_3_0", "OPENSSL_NO_SCRYPT", "OPENSSL_NO_SM3", "OPENSSL_NO_RMD160", "OPENSSL_NO_EC2M", "OPENSSL_NO_OCSP", "OPENSSL_NO_CMS", "OPENSSL_NO_COMP", "OPENSSL_NO_SOCK", "OPENSSL_NO_STDIO", "OPENSSL_NO_EC", "OPENSSL_NO_SSL3_METHOD", "OPENSSL_NO_KRB5", "OPENSSL_NO_TLSEXT", "OPENSSL_NO_SRP", "OPENSSL_NO_RFC3779", "OPENSSL_NO_SHA", "OPENSSL_NO_NEXTPROTONEG", "OPENSSL_NO_ENGINE", "OPENSSL_NO_BUF_FREELISTS", "OPENSSL_NO_RC2"))
  cargo:rustc-check-cfg=cfg(openssl)
  cargo:rustc-check-cfg=cfg(libressl)
  cargo:rustc-check-cfg=cfg(boringssl)
  cargo:rustc-check-cfg=cfg(awslc)
  cargo:rustc-check-cfg=cfg(libressl250)
  cargo:rustc-check-cfg=cfg(libressl251)
  cargo:rustc-check-cfg=cfg(libressl252)
  cargo:rustc-check-cfg=cfg(libressl261)
  cargo:rustc-check-cfg=cfg(libressl270)
  cargo:rustc-check-cfg=cfg(libressl271)
  cargo:rustc-check-cfg=cfg(libressl273)
  cargo:rustc-check-cfg=cfg(libressl280)
  cargo:rustc-check-cfg=cfg(libressl281)
  cargo:rustc-check-cfg=cfg(libressl291)
  cargo:rustc-check-cfg=cfg(libressl310)
  cargo:rustc-check-cfg=cfg(libressl321)
  cargo:rustc-check-cfg=cfg(libressl332)
  cargo:rustc-check-cfg=cfg(libressl340)
  cargo:rustc-check-cfg=cfg(libressl350)
  cargo:rustc-check-cfg=cfg(libressl360)
  cargo:rustc-check-cfg=cfg(libressl361)
  cargo:rustc-check-cfg=cfg(libressl370)
  cargo:rustc-check-cfg=cfg(libressl380)
  cargo:rustc-check-cfg=cfg(libressl381)
  cargo:rustc-check-cfg=cfg(libressl382)
  cargo:rustc-check-cfg=cfg(libressl390)
  cargo:rustc-check-cfg=cfg(libressl400)
  cargo:rustc-check-cfg=cfg(libressl410)
  cargo:rustc-check-cfg=cfg(ossl101)
  cargo:rustc-check-cfg=cfg(ossl102)
  cargo:rustc-check-cfg=cfg(ossl102f)
  cargo:rustc-check-cfg=cfg(ossl102h)
  cargo:rustc-check-cfg=cfg(ossl110)
  cargo:rustc-check-cfg=cfg(ossl110f)
  cargo:rustc-check-cfg=cfg(ossl110g)
  cargo:rustc-check-cfg=cfg(ossl110h)
  cargo:rustc-check-cfg=cfg(ossl111)
  cargo:rustc-check-cfg=cfg(ossl111b)
  cargo:rustc-check-cfg=cfg(ossl111c)
  cargo:rustc-check-cfg=cfg(ossl111d)
  cargo:rustc-check-cfg=cfg(ossl300)
  cargo:rustc-check-cfg=cfg(ossl310)
  cargo:rustc-check-cfg=cfg(ossl320)
  cargo:rustc-check-cfg=cfg(ossl330)
  cargo:rustc-check-cfg=cfg(ossl340)
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
  OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
  OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_DIR
  OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=OPENSSL_STATIC
  cargo:rerun-if-env-changed=OPENSSL_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR


  Could not find openssl via pkg-config:

  pkg-config exited with status code 1
  > PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 pkg-config --libs --cflags openssl

  The system library `openssl` required by crate `openssl-sys` was not found.
  The file `openssl.pc` needs to be installed and the PKG_CONFIG_PATH environment variable must contain its parent directory.
  The PKG_CONFIG_PATH environment variable is not set.

  HINT: if you have installed the library, try setting PKG_CONFIG_PATH to the directory containing `openssl.pc`.


  cargo:warning=Could not find directory of OpenSSL installation, and this `-sys` crate cannot proceed without this knowledge. If OpenSSL is installed and this crate had trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the compilation process. See stderr section below for further information.

  --- stderr


  Could not find directory of OpenSSL installation, and this `-sys` crate cannot
  proceed without this knowledge. If OpenSSL is installed and this crate had
  trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the
  compilation process.

  Make sure you also have the development packages of openssl installed.
  For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.

  If you're in a situation where you think the directory *should* be found
  automatically, please open a bug at https://github.com/sfackler/rust-openssl
  and include information about your system as well as this message.

  $HOST = x86_64-unknown-linux-gnu
  $TARGET = x86_64-unknown-linux-gnu
  openssl-sys = 0.9.107


warning: build failed, waiting for other jobs to finish...

[djc]

FWIW the reason cargo build didn't produce any binaries is because it couldn't find an OPENSSL directory, I completely missed that. No idea if that is related or belongs here, but here is the output:

For now you'll need to build OpenSSL to build rustup in the default configuration... that's the thing we're trying to fix here.

[muja]

Okay, and how do I do that? I couldn't find a openssl.pc on the machine, and I cannot install any packages due to missing privileges.