Test fixes

Author: hamishmack

test/gi-gtk/default.nix

@@ -23,7 +23,9 @@ in recurseIntoAttrs rec {
     || stdenv.hostPlatform.isMusl
     # Older versions of GHC fail for aarch64 with
     # error: incompatible pointer to integer conversion assigning to 'ffi_arg' (aka 'unsigned long') from 'HsPtr' (aka 'void *') [-Wint-conversion]
-    || builtins.elem compiler-nix-name ["ghc8107" "ghc902" "ghc928" "ghc948"] && stdenv.hostPlatform.isAarch64;
+    || builtins.elem compiler-nix-name ["ghc8107" "ghc902" "ghc928" "ghc948"] && stdenv.hostPlatform.isAarch64
+    # Cross compilation to aarch64 is also broken
+    || stdenv.hostPlatform.isAarch64 && !stdenv.buildPlatform.isAarch64;
 
   ifdInputs = {
     inherit (project) plan-nix;