-P2_VERSION=$($PYTHON2 -c "import sys;print(sys.version[:3])")
-P3_VERSION=$($PYTHON3 -c "import sys;print(sys.version[:3])")
+P2_VERSION=$($PYTHON2 -c 'import sys;v = sys.version.split()[0].split("."); print("{}.{}".format(v[0], v[1]))')
+P3_VERSION=$($PYTHON3 -c 'import sys;v = sys.version.split()[0].split("."); print("{}.{}".format(v[0], v[1]))')