diff --git a/install.sh b/install.sh
index 5339e6a..2f63c90 100755
--- a/install.sh
+++ b/install.sh
@@ -2,9 +2,10 @@
 
 set -e
 
-PYDIR=`python3 -Ic "from distutils.sysconfig import get_python_lib; print(get_python_lib())"`
+SITE_PACKAGES=`python3 -Ic "from distutils.sysconfig import get_python_lib; print(get_python_lib())"`
 
 set -x
 
-cp -afv ipsilon ${ROOT}${PYDIR}/
-cp -afv openid ${ROOT}${PYDIR}/
+cp -afv ipsilon ${ROOT}${SITE_PACKAGES}/
+cp -afv openid ${ROOT}${SITE_PACKAGES}/
+python3 -m compileall ${ROOT}${SITE_PACKAGES}/{ipsilon,openid}