cross-canary: Review for static builds

overlay/mobile-nixos/cross-canary/test.nix

@@ -1,6 +1,8 @@
-{ stdenv, runCommandNoCC, runtimeShell, busybox, hello-mruby, pkgsBuildBuild, pkgsStatic }:
+{ stdenv, runCommandNoCC, runtimeShell, busybox, hello, hello-mruby, pkgsBuildBuild, mruby, mrbgems }:
 
 let
+  static = stdenv.hostPlatform.isStatic;
+
   inherit (stdenv) system;
   emulators = {
     "aarch64-linux" = "qemu-aarch64";
@@ -22,28 +24,39 @@ let
     # Everything went okay, mark the build as a success!
     touch $out
   '';
+
+  # Enables a couple mrbgems that are known to be fickle.
+  mrubyWithGems = mruby.override({
+    gems = with mrbgems; [
+      mruby-file-stat
+    ];
+  });
 in
 
 # We're not creating a "useless" canary when there is no cross compilation.
-if stdenv.buildPlatform == stdenv.hostPlatform then {} else
+if stdenv.buildPlatform == stdenv.hostPlatform then {} else (
+# We're not creating known-failing static builds.
+(if static then {} else
 {
+  runtimeShell = mkTest "runtimeShell" ''
+    ${emulator} ${runtimeShell} -c 'echo runtimeShell works...'
+  '';
+}) // {
   busybox = mkTest "busybox" ''
-    # Checks that busybox works
     ${emulator} ${busybox}/bin/busybox uname -a
     ${emulator} ${busybox}/bin/busybox sh -c 'echo busybox works...'
   '';
 
+  hello = mkTest "hello" ''
+    ${emulator} ${hello}/bin/hello
+  '';
+
   mruby = mkTest "mruby" ''
-    # Checks that mruby works at its most basic.
     ${emulator} ${hello-mruby}/bin/hello
   '';
 
-  runtimeShell = mkTest "runtimeShell" ''
-    # And what about runtimeShell?
-    ${emulator} ${runtimeShell} -c 'echo runtimeShell works...'
-  '';
-
-  static-mruby = mkTest "static-mruby" ''
-    ${emulator} ${pkgsStatic.hello-mruby}/bin/hello
+  mruby-with-gems = mkTest "mruby-with-gems" ''
+    ${emulator} ${mrubyWithGems}/bin/mruby --version
   '';
 }
+)