fix: overridable per-user BLHeliSuite32 state dir

Separate BLHeliSuite32 state workaround from dist and add per-user state
dir.

home/util/home.nix

@@ -19,7 +19,7 @@ in {
     betaflight-configurator
     inav-configurator
     inav-blackbox-tools
-    blhelisuite32
+    (blhelisuite32.override { workdir = "${config.home.homeDirectory}/.blhelisuite32"; })
     expresslrs-configurator
   ];
 

package/blhelisuite32/default.nix

@@ -4,23 +4,17 @@
 , fetchzip
 , stdenvNoCC
 , makeDesktopItem
-, buildFHSUserEnv }: let
+, buildFHSUserEnv
+, workdir ? "/tmp/blhelisuite32" }: let
   name = "BLHeliSuite32";
   pname = "blhelisuite32";
-  workdir = "/tmp/${pname}";
   version = "32.10";
   suffix = "1044";
 
   dist = fetchzip {
     name = "${pname}-dist";
     url = "https://github.com/bitdump/BLHeli/releases/download/Rev${version}/${name}xLinux64_${suffix}.zip";
-    hash = "sha256-lempCne+Sf/38WHfJHRdL6MspSpi+UhpZNFcsPgI0jw=";
-
-    postFetch = ''
-      # BLHeliSuite32 tries to write next to its binary
-      ln -s ${workdir}/settings $out/Settings
-      ln -s ${workdir}/music $out/Music
-    '';
+    hash = "sha256-y4S824s9Ipxb1M1IeD6Lo6k7hmm8CEmPflvhaqZz+84=";
   };
 
   desktopItem = makeDesktopItem {
@@ -56,6 +50,20 @@
       cp -r ${name}*.png "$out"
     '';
   };
+
+  linked = stdenvNoCC.mkDerivation {
+    inherit pname version;
+    phases = [ "unpackPhase" "patchPhase" "installPhase" ];
+    src = dist;
+
+    installPhase = ''
+      cp -r . "$out"
+
+      # BLHeliSuite32 tries to write next to its binary
+      ln -s ${workdir}/settings $out/Settings
+      ln -s ${workdir}/music $out/Music
+    '';
+  };
 in buildFHSUserEnv {
   inherit pname;
   targetPkgs = pkgs: (with pkgs; [
@@ -80,5 +88,5 @@ in buildFHSUserEnv {
   runScript = "sh -c '" +
   "mkdir -p ${workdir}/settings && " +
   "mkdir -p ${workdir}/music && " +
-  "exec ${dist}/${name}xl'";
+  "exec ${linked}/${name}xl'";
 }