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KNOWN_ISSUES.md

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Known Issues

MacOS 10.15 "Catalina"

There is an unsolved issue with the root(/) file system in 10.15 being read-only: NixOS/nix#2925

Our current recommended workaround is putting /nix under /opt/nix and symlinking it via /etc/synthetic.conf:

sudo mkdir /opt/nix
sudo chown ${USER} /opt/nix
sudo sh -c "echo 'nix\t/opt/nix' >> /etc/synthetic.conf"
reboot

After the system reboots you should see the /nix symlink in place:

 % ls -l /nix
lrwxr-xr-x  1 root  wheel  8 Oct 11 13:53 /nix -> /opt/nix

In order to be able to use Nix with a symlinked /nix you need to include this in your shell:

export NIX_IGNORE_SYMLINK_STORE=1

Add it to your .bashrc or any other shell config file.

NOTE: Your old /nix directory will end up in /Users/Shared/Relocated Items/Security/nix after OS upgrade.

Cache Downloads Timing Out

If copying from Nix Cache times out you can adjust the timeout by changing nix/nix.conf:

stalled-download-timeout = 9001

NDK Bundle Download Failures

There is a known issue(#11111) where the fetching of Android NDK Bundle from our own cache host fails in various different ways:

unable to download 'https://nix-cache.status.im/nar/64g5wharwjj040rg1v8jnc5qhv1hkgds.nar':
  HTTP error 200 (curl error: Stream error in the HTTP/2 framing layer)

unable to download 'https://nix-cache.status.im/nar/64g5wharwjj040rg1v8jnc5qhv1hkgds.nar':
  HTTP error 200 (curl error: Transferred a partial file)

NAR for '/nix/store/psx79cnz1khfjlzkw3j8x9sb1jhk1v1a-ndk-bundle-21.0.6113669' fetched from 'https://nix-cache.status.im' is incomplete

Currently the simplest temporary solution is to edit nix/nix.conf and comment out the extra-substituters line. This should allow Nix to download the NDK Bundle directly from Google servers rather than from our own cache.

extra-sandbox-paths Is a Restricted Setting

When building Android on NixOS you might encounter the following error:

ignoring the user-specified setting 'extra-sandbox-paths', because it is a restricted setting and you are not a trusted user

You can mitigate this by setting the nix.trustedUsers property.

NixOS Prioritizes System Config

Currently on NixOS NIX_CONF_DIR is being ignored in favor of the default /etc/nix/nix.conf. This will be possible to fix once Nix 2.4 comes out with support for NIX_USER_CONF_FILES.

For more details see NixOS/nix#3723.