--via-asm only on windows

Author: angerman

builder/comp-builder.nix

@@ -170,7 +170,7 @@ let
       ++ lib.optional (deadCodeElimination && stdenv.hostPlatform.isLinux) "--enable-split-sections"
       ++ lib.optional (static) "--enable-static"
       ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) (
-        map (arg: "--hsc2hs-option=" + arg) ["--cross-compile" "--via-asm"]
+        map (arg: "--hsc2hs-option=" + arg) (["--cross-compile"] ++ lib.optionals (stdenv.hostPlatform.isWindows) ["--via-asm"])
         ++ lib.optional (package.buildType == "Configure") "--configure-option=--host=${stdenv.hostPlatform.config}" )
       ++ component.configureFlags
   );