Add missing runtime dependencies

default.nix

@@ -1,9 +1,13 @@
 {
   stdenv,
   lib,
-  shellcheck-minimal,
+  git,
+  gnused,
+  bash,
   bats,
+  shellcheck-minimal,
   gitMinimal,
+  makeWrapper,
 }:
 
 let
@@ -21,6 +25,10 @@ stdenv.mkDerivation {
     ];
   };
 
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
   postPatch = ''
     patchShebangs .
   '';
@@ -47,6 +55,13 @@ stdenv.mkDerivation {
     mkdir -p $out/bin
     cp $src/git-check-assertions $out/bin/git-check-assertions
     chmod +x $out/bin/git-check-assertions
+    wrapProgram $out/bin/git-check-assertions --prefix PATH : ${
+      lib.makeBinPath [
+        bash
+        gitMinimal
+        gnused
+      ]
+    }
   '';
 
   meta.mainProgram = "git-check-assertions";