diff --git a/.github/workflows/build-ruby.yml b/.github/workflows/build-ruby.yml
index e469bbd..c4703d9 100644
--- a/.github/workflows/build-ruby.yml
+++ b/.github/workflows/build-ruby.yml
@@ -22,112 +22,68 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          # gnu
           - engine: ruby
             version: "2.1"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "2.2"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "2.3"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "2.4"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "2.5"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "2.6"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "2.7"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "3.0"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "3.1"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "3.2"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "3.3"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: ruby
             version: "3.4"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: jruby
             version: "9.2"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: jruby
             version: "9.3"
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
           - engine: jruby
             version: "9.4"
-    runs-on: ubuntu-latest
-    name: Build (${{ matrix.engine }} ${{ matrix.version }} gnu)
-    steps:
-      - name: Set variables
-        id: vars
-        run: |
-          echo "SRC=src/engines/${{ matrix.engine }}/${{ matrix.version }}" >> $GITHUB_OUTPUT
-          echo "IMAGE=${{ env.REGISTRY }}/${{ env.REPO }}/engines/${{ matrix.engine }}" >> $GITHUB_OUTPUT
-          echo "TAG=${{ matrix.version }}" >> $GITHUB_OUTPUT
-          echo "DOCKERFILE=src/engines/${{ matrix.engine }}/${{ matrix.version }}/Dockerfile" >> $GITHUB_OUTPUT
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      # Using docker-container engine enables advanced buildx features
-      - name: Set up Docker container engine
-        run: |
-          docker buildx create --name=container --driver=docker-container --use --bootstrap
-
-      # First, build image for x86_64 as it will fail fast
-      #
-      # Tagging is necessary to reference the image for the testing step
-      # Tagging is done separately to avoid interfrence with caching
-      - name: Build single-arch image (x86_64)
-        run: |
-          docker buildx build ${{ steps.vars.outputs.SRC }} --builder=container --cache-from=type=registry,ref=${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} --output=type=image,push=false --platform linux/x86_64 -f ${{ steps.vars.outputs.DOCKERFILE }}
-      - name: Tag single-arch image (x86_64)
-        run: |
-          docker buildx build ${{ steps.vars.outputs.SRC }} --builder=container --cache-from=type=registry,ref=${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} --load --platform linux/x86_64 -f ${{ steps.vars.outputs.DOCKERFILE }} --tag ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }}
-      - name: Test single-arch image (x86_64)
-        run: |
-          docker run --platform linux/x86_64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} /bin/sh -c 'true'
-          docker run --platform linux/x86_64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} ruby -e 'puts RUBY_DESCRIPTION'
-          docker run --platform linux/x86_64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} gem --version
-          docker run --platform linux/x86_64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} bundle --version
-          docker run --platform linux/x86_64 --rm -v "${PWD}":"${PWD}" -w "${PWD}" ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} /bin/sh -c 'bundle install && bundle exec rake test'
-
-      # Then, build image for aarch64 which, being emulated under qemu, is slower
-      #
-      # Tagging is necessary to reference the image for the testing step
-      # Tagging is done separately to avoid interfrence with caching
-      # Start by enabling qemu for aarch64
-      - name: Enable aarch64 emulation (x86_64)
-        run: |
-          docker run --privileged --rm tonistiigi/binfmt --install arm64
-      - name: Build single-arch image (aarch64)
-        run: |
-          docker buildx build ${{ steps.vars.outputs.SRC }} --builder=container --cache-from=type=registry,ref=${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} --output=type=image,push=false --platform linux/aarch64 -f ${{ steps.vars.outputs.DOCKERFILE }}
-      - name: Tag single-arch image (aarch64)
-        run: |
-          docker buildx build ${{ steps.vars.outputs.SRC }}  --builder=container --cache-from=type=registry,ref=${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} --load --platform linux/aarch64 -f ${{ steps.vars.outputs.DOCKERFILE }} --tag ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }}
-      - name: Test single-arch image (aarch64)
-        run: |
-          docker run --platform linux/aarch64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} /bin/sh -c 'true'
-          docker run --platform linux/aarch64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} ruby -e 'puts RUBY_DESCRIPTION'
-          docker run --platform linux/aarch64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} gem --version
-          docker run --platform linux/aarch64 --rm ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} bundle --version
-          docker run --platform linux/aarch64 --rm -v "${PWD}":"${PWD}" -w "${PWD}" ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} /bin/sh -c 'bundle install && bundle exec rake test'
-
-      # Finally, assemble multi-arch image for a combined push to the registry
-      #
-      # This reruns docker build but layers are in the cache, so it's fast
-      - name: Log in to the Container Registry
-        if: ${{ inputs.push }}
-        run: |
-          echo ${{ secrets.GITHUB_TOKEN }} | docker login ${{ env.REGISTRY }} -u ${{ github.actor }} --password-stdin
-      - name: Build multi-arch image (x86_64, aarch64)
-        if: ${{ inputs.push }}
-        run: |
-          docker buildx build ${{ steps.vars.outputs.SRC }} --builder=container --cache-from=type=registry,ref=${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }} --output=type=image,push=true --build-arg BUILDKIT_INLINE_CACHE=1 --platform linux/x86_64,linux/aarch64 -f ${{ steps.vars.outputs.DOCKERFILE }} --tag ${{ steps.vars.outputs.IMAGE }}:${{ steps.vars.outputs.TAG }}
-
-
-  build-musl:
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
+            libc: gnu
+            arch: ["x86_64", "aarch64"]
+          # musl
           - engine: ruby
             version: "2.1"
             libc: musl
@@ -189,7 +145,7 @@ jobs:
             libc: musl
             arch: ["x86_64", "aarch64"]
     runs-on: ubuntu-latest
-    name: Build (${{ matrix.engine }} ${{ matrix.version }} musl)
+    name: Build (${{ matrix.engine }} ${{ matrix.version }} ${{ matrix.libc }})
     steps:
       - name: Set variables
         id: vars
diff --git a/src/engines/jruby/9.2/Dockerfile b/src/engines/jruby/9.2/Dockerfile.gnu
similarity index 100%
rename from src/engines/jruby/9.2/Dockerfile
rename to src/engines/jruby/9.2/Dockerfile.gnu
diff --git a/src/engines/jruby/9.3/Dockerfile b/src/engines/jruby/9.3/Dockerfile.gnu
similarity index 100%
rename from src/engines/jruby/9.3/Dockerfile
rename to src/engines/jruby/9.3/Dockerfile.gnu
diff --git a/src/engines/jruby/9.4/Dockerfile b/src/engines/jruby/9.4/Dockerfile.gnu
similarity index 100%
rename from src/engines/jruby/9.4/Dockerfile
rename to src/engines/jruby/9.4/Dockerfile.gnu
diff --git a/src/engines/ruby/2.1/Dockerfile b/src/engines/ruby/2.1/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.1/Dockerfile
rename to src/engines/ruby/2.1/Dockerfile.gnu
diff --git a/src/engines/ruby/2.2/Dockerfile b/src/engines/ruby/2.2/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.2/Dockerfile
rename to src/engines/ruby/2.2/Dockerfile.gnu
diff --git a/src/engines/ruby/2.3/Dockerfile b/src/engines/ruby/2.3/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.3/Dockerfile
rename to src/engines/ruby/2.3/Dockerfile.gnu
diff --git a/src/engines/ruby/2.4/Dockerfile b/src/engines/ruby/2.4/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.4/Dockerfile
rename to src/engines/ruby/2.4/Dockerfile.gnu
diff --git a/src/engines/ruby/2.5/Dockerfile b/src/engines/ruby/2.5/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.5/Dockerfile
rename to src/engines/ruby/2.5/Dockerfile.gnu
diff --git a/src/engines/ruby/2.6/Dockerfile b/src/engines/ruby/2.6/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.6/Dockerfile
rename to src/engines/ruby/2.6/Dockerfile.gnu
diff --git a/src/engines/ruby/2.7/Dockerfile b/src/engines/ruby/2.7/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/2.7/Dockerfile
rename to src/engines/ruby/2.7/Dockerfile.gnu
diff --git a/src/engines/ruby/3.0/Dockerfile b/src/engines/ruby/3.0/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/3.0/Dockerfile
rename to src/engines/ruby/3.0/Dockerfile.gnu
diff --git a/src/engines/ruby/3.1/Dockerfile b/src/engines/ruby/3.1/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/3.1/Dockerfile
rename to src/engines/ruby/3.1/Dockerfile.gnu
diff --git a/src/engines/ruby/3.2/Dockerfile b/src/engines/ruby/3.2/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/3.2/Dockerfile
rename to src/engines/ruby/3.2/Dockerfile.gnu
diff --git a/src/engines/ruby/3.3/Dockerfile b/src/engines/ruby/3.3/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/3.3/Dockerfile
rename to src/engines/ruby/3.3/Dockerfile.gnu
diff --git a/src/engines/ruby/3.4/Dockerfile b/src/engines/ruby/3.4/Dockerfile.gnu
similarity index 100%
rename from src/engines/ruby/3.4/Dockerfile
rename to src/engines/ruby/3.4/Dockerfile.gnu