diff --git a/flake.nix b/flake.nix
index 375f8c9..b4e13db 100644
--- a/flake.nix
+++ b/flake.nix
@@ -100,7 +100,7 @@
         (final: prev: {
           rustc = prev.rustc.overrideAttrs (old: {
             postPatch = (old.postPatch or "") + ''
-              sed -i 's|if !self.config.dry_run() { symlink_file(src.as_ref(), link.as_ref()) }|if !self.config.dry_run() { let _ = std::fs::remove_file(link.as_ref()); symlink_file(src.as_ref(), link.as_ref()) }|' src/bootstrap/src/lib.rs
+              sed -i "s|if !self.config.dry_run() { symlink_file(src.as_ref(), link.as_ref()) }|if !self.config.dry_run() { let _ = std::fs::remove_file(link.as_ref()); symlink_file(src.as_ref(), link.as_ref()) }|" src/bootstrap/src/lib.rs
             '';
           });
         })