mkdir -p "$WORKSPACE/build"
PYTHON3=python3
-P3_VERSION=$($PYTHON3 -c "import sys;print(sys.version[:3])")
+P3_VERSION=$($PYTHON3 -c 'import sys;v = sys.version.split()[0].split("."); print("{}.{}".format(v[0], v[1]))')
# liburcu
URCU_INCS="$WORKSPACE/deps/liburcu/build/include/"