diff --git a/vlang/shell.nix b/vlang/shell.nix
index 86382b9..f79f930 100644
--- a/vlang/shell.nix
+++ b/vlang/shell.nix
@@ -13,12 +13,15 @@ pkgs.mkShell rec {
         openblas
         openmpi
         metis
+        # for v ui
         xorg.libX11
         xorg.libXau
         xorg.libXdmcp
         xorg.xorgproto
         xorg.libXcursor
         xorg.libXi
+        # for c2v
+        clang
         #mesa
     ];
     shellHook = ''