From b10e9abc4250b68032af2d675f69319d47948cb6 Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Sun, 24 Jul 2022 00:01:41 -0700
Subject: [PATCH] Suggest cargo install --locked on MSRV errors when installing

---
 src/cargo/ops/cargo_compile.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/cargo/ops/cargo_compile.rs b/src/cargo/ops/cargo_compile.rs
index 2ba1a62e8e18..4d1eed96da38 100644
--- a/src/cargo/ops/cargo_compile.rs
+++ b/src/cargo/ops/cargo_compile.rs
@@ -662,7 +662,11 @@ pub fn create_bcx<'a, 'cfg>(
             }
 
             let guidance = if ws.is_ephemeral() {
-                String::new()
+                if ws.ignore_lock() {
+                    "Try re-running cargo install with `--locked`".to_string()
+                } else {
+                    String::new()
+                }
             } else {
                 format!(
                     "Either upgrade to rustc {} or newer, or use\n\