diff --git a/build-wasm-app.nix b/build-wasm-app.nix
index 5bbc8f9..19c38a8 100644
--- a/build-wasm-app.nix
+++ b/build-wasm-app.nix
@@ -26,6 +26,7 @@ let
 in { ename, pkg, assets ? [], scripts ? [], styles ? [] }: runCommand "wasm-app-${ename}" {
   nativeBuildInputs = [ buildPackages.xorg.lndir buildPackages.binaryen ];
   passthru = { inherit pkg; };
+  meta.platforms = ["wasm32-unknown"];
 } ''
   mkdir -p $out
   lndir ${buildPackages.webabi}/lib/node_modules/webabi/build $out
diff --git a/default.nix b/default.nix
index d154f37..53c7188 100644
--- a/default.nix
+++ b/default.nix
@@ -24,7 +24,13 @@
       '';
 
       build-wasm-app = self.callPackage ./build-wasm-app.nix {};
+
+      # Issue happens when combining pkgsStatic & custom cross stdenv.
+      # We need to force a normal busybox here to avoid hitting a
+      # weird bootstrapping issue.
+      busybox-sandbox-shell = super.busybox-sandbox-shell.override { busybox = self.busybox; };
     })] ++ overlays;
+    config = { allowUnsupportedSystem = true; };
   };
   nixpkgsCrossArgs = project.nixpkgsArgs // {
     stdenvStages = import ./cross.nix haskellProfiling;
diff --git a/release.nix b/release.nix
index 1e980f0..3c08a10 100644
--- a/release.nix
+++ b/release.nix
@@ -8,7 +8,7 @@ let
     inherit (pkgs) musl-cross;
     fib-example = pkgs.fib-example.pkg;
     hello-example = pkgs.hello-example.pkg;
-    inherit (pkgs.haskell.packages.integer-simple.ghc863) hello ghc;
+    inherit (pkgs.haskell.packages.integer-simple.ghc865) hello ghc;
   };
 in {
   inherit (nixpkgs.llvmPackages_HEAD) llvm clang clang-unwrapped compiler-rt