kubernetes-helmPlugins.helm-unittest: fix per-arch exec error (#537022)

pkgs/applications/networking/cluster/helm/plugins/helm-unittest.nix

@@ -2,7 +2,6 @@
   buildGoModule,
   fetchFromGitHub,
   lib,
-  yq-go,
   nix-update-script,
 }:
 
@@ -22,21 +21,29 @@ buildGoModule {
 
   vendorHash = "sha256-4ckjM520MGYb64LbjYURe7AIScm4aGbj81rGKSSYaAo=";
 
-  # NOTE: Remove the install and upgrade hooks.
   postPatch = ''
-    sed -i '/^hooks:/,+2 d' plugin.yaml
+    # Remove the install and upgrade hooks.
+    sed -i '/^platformHooks:[[:space:]]*$/,/^[^[:space:]]/d' plugin.yaml
+    # Remove the per-platform commands
+    sed -i '/^platformCommand:[[:space:]]*$/,/^[^[:space:]]/d' plugin.yaml
+    # Add a simple runtime config
+    cat <<'EOF' >> ./plugin.yaml
+    platformCommand:
+      - command: "''$HELM_PLUGIN_DIR/helm-unittest"
+    EOF
   '';
 
-  postInstall = ''
-    install -dm755 $out/helm-unittest
-    mv $out/bin/helm-unittest $out/helm-unittest/untt
-    rmdir $out/bin
-    install -m644 -Dt $out/helm-unittest plugin.yaml
-  '';
+  subPackages = [ "cmd/helm-unittest" ];
 
-  nativeCheckInputs = [
-    yq-go
-  ];
+  installPhase = ''
+    runHook preInstall
+
+    install -dm755 "$out/helm-unittest"
+    install -m755 -Dt "$out/helm-unittest" "$GOPATH/bin/helm-unittest"
+    install -m644 -Dt "$out/helm-unittest" ./plugin.yaml
+
+    runHook postInstall
+  '';
 
   passthru = {
     updateScript = nix-update-script { };