gobject-introspection: enable strictDeps and improve cross conditional

the flags defined in it are required if the hostPlatform can't be executed

pkgs/development/libraries/gobject-introspection/default.nix

@@ -64,6 +64,8 @@ stdenv.mkDerivation (finalAttrs: {
     })
   ];
 
+  strictDeps = true;
+
   nativeBuildInputs = [
     meson
     ninja
@@ -76,7 +78,7 @@ stdenv.mkDerivation (finalAttrs: {
     # Build definition checks for the Python modules needed at runtime by importing them.
     (buildPackages.python3.withPackages pythonModules)
     finalAttrs.setupHook # move .gir files
-  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [ gobject-introspection-unwrapped ];
+  ] ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [ gobject-introspection-unwrapped ];
 
   buildInputs = [
     (python3.withPackages pythonModules)
@@ -95,7 +97,7 @@ stdenv.mkDerivation (finalAttrs: {
     "--datadir=${placeholder "dev"}/share"
     "-Dcairo=disabled"
     "-Dgtk_doc=${lib.boolToString (stdenv.hostPlatform == stdenv.buildPlatform)}"
-  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+  ] ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
     "-Dgi_cross_ldd_wrapper=${substituteAll {
       name = "g-ir-scanner-lddwrapper";
       isExecutable = true;