tunefish: use writableTmpDirAsHomeHook

pkgs/by-name/tu/tunefish/package.nix

@@ -13,6 +13,7 @@
   libxext,
   libxinerama,
   libxrandr,
+  writableTmpDirAsHomeHook,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -32,6 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     pkg-config
     python3
+    writableTmpDirAsHomeHook # silences build warnings
   ];
 
   buildInputs = [
@@ -52,9 +54,6 @@ stdenv.mkDerivation (finalAttrs: {
     "CONFIG=Release"
   ];
 
-  # silences build warnings
-  env.HOME = "/build";
-
   postPatch = ''
     patchShebangs src/tunefish4/generate-lv2-ttl.py
   '';