diff --git a/pkgs/development/compilers/mrustc/bootstrap.nix b/pkgs/development/compilers/mrustc/bootstrap.nix
index 8105b0e11db1..a3e9a370663f 100644
--- a/pkgs/development/compilers/mrustc/bootstrap.nix
+++ b/pkgs/development/compilers/mrustc/bootstrap.nix
@@ -121,7 +121,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
   checkPhase = ''
     runHook preCheck
-    run_rustc/${outputDir}/prefix/bin/hello_world | grep "hello, world"
+    run_rustc/${outputDir}/prefix/bin/hello_world | grep -F "Hello, world!"
     runHook postCheck
   '';