diff --git a/flake.nix b/flake.nix
index b9a6233a5..cc7c48909 100644
--- a/flake.nix
+++ b/flake.nix
@@ -49,7 +49,7 @@
     inherit (gitignore.lib) gitignoreSource;
   in {
     overlays.default = final: prev: let
-      goModHash = "sha256-2vljseczrvsl2T0P9k69ro72yU59l5fp9r/sszmXYY4=";
+      goModHash = "sha256-EilWxfqrcKDaSR5zA3ZuDSCq7V+/IfWpKPu8HWhpndA=";
       buildCmdPackage = name:
         final.buildGoModule {
           pname = name;
diff --git a/patchutil/patchutil.go b/patchutil/patchutil.go
index 8132e19ea..a0a94ddbc 100644
--- a/patchutil/patchutil.go
+++ b/patchutil/patchutil.go
@@ -182,7 +182,7 @@ func Unified(oldText, oldFile, newText, newFile string) (string, error) {
 	}
 	newTemp.Close()
 
-	cmd := exec.Command("diff", "-U", "9999", "--label", oldFile, "--label", newFile, oldTemp.Name(), newTemp.Name())
+	cmd := exec.Command("diff", "-u", "--label", oldFile, "--label", newFile, oldTemp.Name(), newTemp.Name())
 	output, err := cmd.CombinedOutput()
 
 	if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 1 {