circleci: use venv

.circleci/config.yml

@@ -19,7 +19,9 @@ jobs:
             export DEBIAN_FRONTEND=noninteractive
             export TZ=America/USA
             apt update
-            apt install -y build-essential libantlr4-runtime-dev antlr4 cmake ninja-build python3-pip python3-dev python3 python3-pip git lcov rubygems
+            apt install -y build-essential libantlr4-runtime-dev antlr4 cmake ninja-build python3-pip python3-dev python3 python3-pip python3-venv git lcov rubygems
+            python3 -m venv venv
+            echo "source $PWD/venv/bin/activate" >> $BASH_ENV
             echo 'export SKBUILD_CONFIGURE_OPTIONS="-DCMAKE_BUILD_TYPE:STRING=Debug -DCODE_COVERAGE=ON"' >> $BASH_ENV
             # because we do not have enough RAM
             echo 'export SKBUILD_BUILD_OPTIONS="-j1"' >> $BASH_ENV
@@ -83,7 +85,9 @@ jobs:
             export DEBIAN_FRONTEND=noninteractive
             export TZ=America/USA
             apt update
-            apt install -y build-essential libantlr4-runtime-dev antlr4 cmake ninja-build python3-pip python3-dev python3 python3-pip git lcov rubygems
+            apt install -y build-essential libantlr4-runtime-dev antlr4 cmake ninja-build python3-pip python3-dev python3 python3-pip python3-venv git lcov rubygems
+            python3 -m venv venv
+            echo "source $PWD/venv/bin/activate" >> $BASH_ENV
             # because we do not have enough RAM
             echo 'export SKBUILD_BUILD_OPTIONS="-j1"' >> $BASH_ENV
             source $BASH_ENV
@@ -110,7 +114,7 @@ jobs:
       #      echo export CXXFLAGS=\"$CXXFLAGS --param ggc-min-expand=1 --param ggc-min-heapsize=32768\" >> "$BASH_ENV"
       - py/install-setup-py:
           rm-package-dir: true
-          build-args: "--user --verbose"
+          build-args: "--verbose"
       # - python/save-cache
       - py/test-and-coverage:
           coverage: false