diff --git a/Dockerfile b/Dockerfile
index 6ec4654..48d2cd8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,20 @@
 FROM debian:stable-slim
-ARG LLVM_VERSION=18
+ARG LLVM_VERSION=14
 ENV LLVM_VERSION=${LLVM_VERSION}
 ARG TZ=Etc/GMT-8
 ENV TZ=${TZ}
 RUN set -eux; \
     apt-get update; \
     DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes \
-    curl ca-certificates gpg xz-utils make flex bison libssl-dev libelf-dev bc python3-minimal dwarves tzdata cpio; \
-    curl -fsSL https://apt.llvm.org/llvm-snapshot.gpg.key | \
-    gpg --dearmor -o /usr/share/keyrings/llvm-apt-archive-keyring.gpg; \
-    . /etc/os-release; \
-    echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/llvm-apt-archive-keyring.gpg] \
-    https://apt.llvm.org/$VERSION_CODENAME llvm-toolchain-$VERSION_CODENAME-$LLVM_VERSION main" | \
-    tee /etc/apt/sources.list.d/llvm-apt.list >/dev/null; \
-    apt-get update; \
-    DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes \
-    clang-$LLVM_VERSION lld-$LLVM_VERSION llvm-$LLVM_VERSION; \
+    curl ca-certificates gpg xz-utils make flex bison libssl-dev libelf-dev bc python3-minimal dwarves tzdata cpio clang-${LLVM_VERSION} lld-${LLVM_VERSION} llvm-${LLVM_VERSION}; \
+    # curl -fsSL https://apt.llvm.org/llvm-snapshot.gpg.key | \
+    # gpg --dearmor -o /usr/share/keyrings/llvm-apt-archive-keyring.gpg; \
+    # . /etc/os-release; \
+    # echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/llvm-apt-archive-keyring.gpg] \
+    # https://apt.llvm.org/$VERSION_CODENAME llvm-toolchain-$VERSION_CODENAME-$LLVM_VERSION main" | \
+    # tee /etc/apt/sources.list.d/llvm-apt.list >/dev/null; \
+    # apt-get update; \
+    # DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes \
+    # clang-$LLVM_VERSION lld-$LLVM_VERSION llvm-$LLVM_VERSION; \
     update-alternatives --install /usr/bin/cc cc /usr/bin/clang-$LLVM_VERSION 100; \
     rm -rf /var/lib/apt/lists/*
diff --git a/build-kernel.sh b/build-kernel.sh
index d8b5be1..7dc0601 100755
--- a/build-kernel.sh
+++ b/build-kernel.sh
@@ -8,7 +8,7 @@ fi
 
 TMPDIR=$(mktemp -d)
 tar xf kernel.tar.xz --strip-components=1 -C $TMPDIR
-curl --silent --remote-name-all https://raw.githubusercontent.com/microsoft/WSL2-Linux-Kernel/linux-msft-wsl-5.15.y/arch/{x86/configs/config-wsl,arm64/configs/config-wsl-arm64}
+curl --silent --remote-name-all https://raw.githubusercontent.com/microsoft/WSL2-Linux-Kernel/linux-msft-wsl-6.1.y/arch/{x86/configs/config-wsl,arm64/configs/config-wsl-arm64}
 
 build_config() {
     if [ -f "$1" ]; then
@@ -33,7 +33,7 @@ build_amd64_kernel() {
             sh <(curl -fsSL https://sh.rustup.rs) --quiet -y --default-toolchain $(scripts/min-tool-version.sh rustc) --profile minimal --component rust-src
             . "$HOME/.cargo/env"
             cargo install --locked --version $(scripts/min-tool-version.sh bindgen) bindgen-cli
-            make LLVM=-${LLVM_VERSION} rustavailable
+            make -j$(nproc) ARCH=x86_64 LLVM=-${LLVM_VERSION} rustavailable
         fi
 
         make -j$(nproc) ARCH=x86_64 LLVM=-${LLVM_VERSION}