dockerTools: Always cross compile for another arch in the cross example

The example fails to build on aarch64, so lets cross build for gnu64.
2020-11-20 12:57:58 +01:00
parent 31c3d39866
commit b7b22c5814
2 changed files with 10 additions and 5 deletions
@@ -408,10 +408,15 @@ rec {
    };

  # basic example, with cross compilation
-  cross-aarch64 = pkgsCross.aarch64-multiplatform.dockerTools.buildImage {
+  cross = let
+    # Cross compile for x86_64 if on aarch64
+    crossPkgs =
+      if pkgs.system == "aarch64-linux" then pkgsCross.gnu64
+      else pkgsCross.aarch64-multiplatform;
+  in crossPkgs.dockerTools.buildImage {
    name = "hello-cross";
    tag = "latest";
-    contents = pkgsCross.aarch64-multiplatform.hello;
+    contents = crossPkgs.hello;
  };

 }