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\