diff --git a/pkgs/tools/misc/fx_cast/default.nix b/pkgs/tools/misc/fx_cast/default.nix
index 65f57d96a11..bb723800f0c 100644
--- a/pkgs/tools/misc/fx_cast/default.nix
+++ b/pkgs/tools/misc/fx_cast/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   # See now-cli/default.nix
   dontStrip = true;
   preFixup = let
-    libPath = stdenv.lib.makeLibraryPath [stdenv.cc.cc];
+    libPath = stdenv.lib.makeLibraryPath [stdenv.cc.cc stdenv.cc.libc];
     bin = "$out/bin/fx_cast_bridge";
   in ''