cockpit-zfs: use postPatch phase instead of patchPhase

pkgs/by-name/co/cockpit-zfs/package.nix

@@ -89,7 +89,7 @@ stdenv.mkDerivation (finalAttrs: {
     ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
   };
 
-  patchPhase =
+  postPatch =
     let
       # houston-common-lib has @types/electron which pulls in electron.
       # Electron's postinstall downloads binaries, which fails in sandbox.
@@ -98,8 +98,6 @@ stdenv.mkDerivation (finalAttrs: {
       houstonUiDir = "houston-common/houston-common-ui";
     in
     ''
-      runHook prePatch
-
       # Remove electron type dependency
       substituteInPlace ${houstonLibDir}/package.json \
         --replace-fail '"@types/electron": "^1.6.12",' ""
@@ -123,8 +121,6 @@ stdenv.mkDerivation (finalAttrs: {
         --replace-fail "VueDevTools()," "" \
         --replace-fail "import dts from 'vite-plugin-dts'" ""
       sed -i '/dts({/,/})/d' ${houstonUiDir}/vite.config.ts
-
-      runHook postPatch
     '';
 
   buildPhase = ''