diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9bb3c98..3ea2c19 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -118,9 +118,7 @@ jobs:
       with: {python-version: 3.11}
     - id: dist
       name: build
-      run: |
-        pip install virtualenv
-        ./build-aarch64-apple-darwin.sh $(python -c 'import sys; print(".".join(map(str,sys.version_info[:2])))')
+      run: ./build-aarch64-apple-darwin.sh
       working-directory: ${{ matrix.model }}
     - uses: actions/upload-artifact@v3
       with:
diff --git a/cht-llama-cpp/README.md b/cht-llama-cpp/README.md
index 2471e50..14cf0d4 100644
--- a/cht-llama-cpp/README.md
+++ b/cht-llama-cpp/README.md
@@ -13,7 +13,6 @@ wget -P ./ml/models/ https://huggingface.co/TheBloke/Mistral-7B-OpenOrca-GGUF/re
 ## Compile the Backend
 
 ```bash
-pip install virtualenv
 ./build-aarch64-apple-darwin.sh
 ```
 
diff --git a/cht-llama-cpp/build-aarch64-apple-darwin.sh b/cht-llama-cpp/build-aarch64-apple-darwin.sh
index 7e9abd8..f65fea9 100755
--- a/cht-llama-cpp/build-aarch64-apple-darwin.sh
+++ b/cht-llama-cpp/build-aarch64-apple-darwin.sh
@@ -1,9 +1,12 @@
 #!/bin/bash
 set -e
-export VERSION=1.1.0
 
-virtualenv venv -p=${1:-3.11}
-source ./venv/bin/activate
+export VERSION=1.1.1
+
+test -f venv/bin/activate || python -m venv venv
+source venv/bin/activate
+
+
 pip install -r requirements.txt pyinstaller
 LLAMA_CPP_PATH=$(python -c 'import llama_cpp; print(llama_cpp.__path__[0])')
 # macOS (dylib) package
@@ -12,6 +15,7 @@ pyinstaller --onefile \
   --target-arch arm64 \
   --add-binary "$LLAMA_CPP_PATH/libllama.dylib:llama_cpp" \
   --name=$NAME \
-  --paths ./venv/lib/python${1:-3.11}/site-packages \
   main.py
 cp dist/$NAME dist/cht-llama-cpp-mistral-${VERSION%%.*}-aarch64-apple-darwin
+
+deactivate