Use patches in the Helm POC

helm-poc/nix/helm.nix

@@ -4,9 +4,16 @@
 , lib ? pkgs.lib
 }:
 let
-  mkHelm = { name, version, url, hash ? lib.fakeSha256 }:
+  mkHelm = {
+    name,
+    version,
+    url,
+    hash ? lib.fakeSha25,
+    namespace ? "",
+    patches ? []
+  }:
     pkgs.stdenv.mkDerivation {
-      inherit name;
+      inherit name patches;
 
       src = pkgs.fetchurl {
         inherit url hash;
@@ -14,13 +21,18 @@ let
 
       phases = [
         "unpackPhase"
+        "patchPhase"
         "build" 
       ];
 
+      namespace = if namespace != "" then "--namespace ${namespace}" else "";
+
       build = ''
         mkdir -p $out
-        ${helm} template ${name} ./ > $out/${name}-${version}.yaml
-        #${helm} version > $out/README 
+        ${helm} template \
+          --namespace ${namespace} \
+          ${name} ./ > $out/${name}-${version}.yaml
+        ${helm} version > $out/VERSION
       '';
     };