diff --git a/pkgs/by-name/co/cosmic-notifications/package.nix b/pkgs/by-name/co/cosmic-notifications/package.nix
index e0cb2c4996ac..baf2dda64bed 100644
--- a/pkgs/by-name/co/cosmic-notifications/package.nix
+++ b/pkgs/by-name/co/cosmic-notifications/package.nix
@@ -45,7 +45,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   postPatch = ''
-    substituteInPlace justfile --replace '#!/usr/bin/env' "#!$(command -v env)"
+    substituteInPlace justfile --replace-fail '#!/usr/bin/env' "#!$(command -v env)"
   '';
 
   nativeBuildInputs = [ just which pkg-config makeBinaryWrapper ];