diff --git a/Dockerfile b/Dockerfile
index cca4828..ae30e1e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
-FROM docker.io/moby/buildkit:master-rootless
+FROM docker.io/moby/buildkit:v0.25.1-rootless
 COPY entrypoint.sh /usr/local/bin/
 ENTRYPOINT ["entrypoint.sh"]
diff --git a/entrypoint.sh b/entrypoint.sh
index f5e6f29..18a8783 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,5 +1,8 @@
 #!/bin/sh -ex
 
+export DOCKER_CONFIG="$HOME/.docker"
+mkdir -p "$DOCKER_CONFIG"
+
 #shellcheck disable=SC1091
 [ -f .env ] && . ./.env
 
@@ -17,8 +20,7 @@ cat <<EOF > "$DOCKER_CONFIG/config.json"
 {
   "auths": {
     "$GITHUB_SERVER_URL": {
-      "username": "$INPUT_USERNAME",
-      "password": "$INPUT_PASSWORD"
+      "auth": "$INPUT_USERNAME:$INPUT_PASSWORD"
     }
   }
 }