diff --git a/default.nix b/default.nix
index 28709d7..71570cc 100644
--- a/default.nix
+++ b/default.nix
@@ -47,7 +47,7 @@ let
       cp -a dist $out
     '';
     npmInstallFlags = "--no-audit --no-progress --no-fund";
-    npmDepsHash = "sha256-44xcyVk5KcurQLkVJv1MeAj+Pfcu53664pvVgHdyv3E=";
+    npmDepsHash = "sha256-p4rTpy0t8aajbubvtF1TA83/FFqvfKEOPBb5T0ZRfQY=";
     npmPackFlags = [ "--ignore-scripts" ];
   };
 
@@ -89,6 +89,7 @@ in
       packages = [
         go
         golangci-lint
+        pkgs.prefetch-npm-deps
 
         nodejs
 
@@ -116,6 +117,24 @@ in
           npm --prefix app/frontend run fix
         '';
       }
+      {
+        name = "pre-commit";
+        help = "Format and fix found issues";
+        command = ''
+          cd ''$PRJ_ROOT
+          golangci-lint run --sort-results --out-format tab --fix
+          npm --prefix ''$PRJ_ROOT/app/frontend run fix
+
+          echo "Calculating npm deps"
+          HASH=''$(prefetch-npm-deps ''$PRJ_ROOT/app/frontend/package-lock.json 2> /dev/null)
+          [[ ''$HASH = sha256* ]] && echo "Hash is ''$HASH"
+          [[ ''$HASH != sha256* ]] && echo "Failed" && exit 137
+
+          # Replace the first occurence of npmDepsHash with the new calculated hash in this file
+          sed -i "0,/npmDepsHash =/{s@npmDepsHash = .*@npmDepsHash = \"''$HASH\";@}" ''$PRJ_ROOT/default.nix
+
+        '';
+      }
       {
         name = "dev";
         help = "Starts the javascript project in dev";