diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index 58f25f6..877d952 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -15,9 +15,6 @@ env:
 jobs:
   build-and-test:
     runs-on: ${{ matrix.arch == 'amd64' && 'ubuntu-latest-amd64' || 'ubuntu-latest-arm64' }}
-    concurrency:
-      group: build-${{ matrix.arch }}
-      cancel-in-progress: false
     strategy:
       matrix:
         arch: [amd64, arm64]
diff --git a/docker/Dockerfile.alpine b/docker/Dockerfile.alpine
index 5a58b41..ce601bc 100644
--- a/docker/Dockerfile.alpine
+++ b/docker/Dockerfile.alpine
@@ -26,14 +26,16 @@ WORKDIR /src/p2pool
 
 RUN git checkout ${P2POOL_VERSION}
 
-# Determine parallel jobs based on cross-compilation
+# Determine parallel jobs based on cross-compilation and architecture
 RUN mkdir build && cd build && \
     if [ "$BUILDPLATFORM" != "$TARGETPLATFORM" ]; then \
         MAKE_JOBS="-j2"; \
+    elif [ "$TARGETARCH" = "amd64" ]; then \
+        MAKE_JOBS="-j$(($(nproc) / 2))"; \
     else \
         MAKE_JOBS="-j$(nproc)"; \
     fi && \
-    echo "Building with parallel jobs: $MAKE_JOBS (cross-compile: $([ "$BUILDPLATFORM" != "$TARGETPLATFORM" ] && echo yes || echo no))" && \
+    echo "Building with parallel jobs: $MAKE_JOBS (arch: $TARGETARCH, cross-compile: $([ "$BUILDPLATFORM" != "$TARGETPLATFORM" ] && echo yes || echo no))" && \
     cmake .. -DCMAKE_BUILD_TYPE=Release -DWITH_MERGE_MINING_DONATION=OFF && \
     make $MAKE_JOBS
 
diff --git a/docker/Dockerfile.ubuntu b/docker/Dockerfile.ubuntu
index 2f6aa2d..7c6bfe0 100644
--- a/docker/Dockerfile.ubuntu
+++ b/docker/Dockerfile.ubuntu
@@ -26,14 +26,16 @@ WORKDIR /src/p2pool
 
 RUN git checkout ${P2POOL_VERSION}
 
-# Determine parallel jobs based on cross-compilation
+# Determine parallel jobs based on cross-compilation and architecture
 RUN mkdir build && cd build && \
     if [ "$BUILDPLATFORM" != "$TARGETPLATFORM" ]; then \
         MAKE_JOBS="-j2"; \
+    elif [ "$TARGETARCH" = "amd64" ]; then \
+        MAKE_JOBS="-j$(($(nproc) / 2))"; \
     else \
         MAKE_JOBS="-j$(nproc)"; \
     fi && \
-    echo "Building with parallel jobs: $MAKE_JOBS (cross-compile: $([ "$BUILDPLATFORM" != "$TARGETPLATFORM" ] && echo yes || echo no))" && \
+    echo "Building with parallel jobs: $MAKE_JOBS (arch: $TARGETARCH, cross-compile: $([ "$BUILDPLATFORM" != "$TARGETPLATFORM" ] && echo yes || echo no))" && \
     cmake .. -DCMAKE_BUILD_TYPE=Release -DWITH_MERGE_MINING_DONATION=OFF && \
     make $MAKE_JOBS