diff --git a/.github/workflows/buildenv.yml b/.github/workflows/buildenv.yml
new file mode 100644
index 0000000..425b4b2
--- /dev/null
+++ b/.github/workflows/buildenv.yml
@@ -0,0 +1,27 @@
+name: Buildenv
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - 'build/**'
+      - '.github/workflows/buildenv.yml'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'build/**'
+      - '.github/workflows/buildenv.yml'
+  schedule:
+    - cron: "0 0 * * 0"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test-buildenv:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build and test buildenv images
+        run: make -C build VERSION=test test
diff --git a/build/Dockerfile.maint b/build/Dockerfile.maint
index 888ffd4..247d034 100644
--- a/build/Dockerfile.maint
+++ b/build/Dockerfile.maint
@@ -26,7 +26,7 @@ RUN mkdir -p $ICU4C_BUILD_DIR && \
 			  --enable-static \
 			  --prefix="/usr/local" \
 			  --enable-debug && \
-		make -j && \
+		make -j4 && \
 		make install && \
 		icu-config --version