diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 72082b02..001ba791 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,11 +41,13 @@ jobs:
             goal: "build"
             gamos: "linux"
             platform: "x86_64"
-          - arch: "aarch64"
+          - os: "ubuntu-18.04"
+            arch: "aarch64"
             distro: "stretch"
             gamos: "linux"
             platform: "aarch64"
-          - arch: "armv6"
+          - os: "ubuntu-18.04"
+            arch: "armv6"
             distro: "jessie"
             gamos: "linux"
             platform: "armv6"