Fix the wm flag detection issue

lisp/fg42/cubes/wm.el

@@ -37,12 +37,14 @@
   :title "Window manager cube"
   :no-flag t
 
-  (if-flag wm
-    (when-wm
-     (message "[WM] Initilizing...")
-     (fpkg/use exwm)
-     (fg42/initialize-wm))
-    (error "[SKIP] WM flag is not active")))
+
+  (when-wm
+   (message "[WM] Initilizing...")
+   (fpkg/use exwm)
+   (fg42/initialize-wm))
+  ;; (if-flag wm
+  ;;   (error "[SKIP] WM flag is not active"))
+  )
 
 (provide 'fg42/cubes/wm)
 ;;; wm.el ends here

nix/fg42.nix

@@ -40,10 +40,14 @@
   gcc,
   ltex-ls,
   bash,
+  tree-sitter,
 
+  supportWM ? true,
+  xorg,   
+  
   supportPython ? true,
 
-  verilogSupport ? true,
+  supportVerilog ? true,
   svls,
   verilator,
 }:
@@ -66,6 +70,7 @@ let
     ripgrep
     git
     ltex-ls
+    tree-sitter
   ] ++ (lib.optional supportPython [
     python311
     # Python deps
@@ -75,9 +80,12 @@ let
     python3Packages.black
     python3Packages.pylint
     python3Packages.flake8
-  ]) ++ (lib.optional verilogSupport [
+  ]) ++ (lib.optional supportVerilog [
     svls
     verilator
+  ]) ++ (lib.optional supportWM [
+    # Window manager supports works on Linux only
+    xorg.xhost
   ]);
 
   paths = map (x: "${x}/bin/") (lib.lists.flatten runtimeBins);
@@ -126,10 +134,10 @@ in stdenv.mkDerivation (final: rec{
     export FG42_HOME=${placeholder "out"}/share/fg42/
     export FG42_EMACSD=~/.fg42/v4/emacs.d
     export FG42_USE_NIX=true;
-    export PATH=${pathsStr}:$PATH
+    export PATH=${pathsStr}:\$PATH
 
     # Disable access control for the current user.
-    xhost +SI:localuser:$USER
+    ${xorg.xhost}/bin/xhost +SI:localuser:\$USER
 
     # Make Java applications aware this is a non-reparenting window manager.
     export _JAVA_AWT_WM_NONREPARENTING=1