diff --git a/client/sources-linux/buildenv.sh b/client/sources-linux/buildenv.sh
index ad286f5c..18d2a019 100755
--- a/client/sources-linux/buildenv.sh
+++ b/client/sources-linux/buildenv.sh
@@ -276,7 +276,7 @@ CFLAGS="-O2 -pipe -DCLOCK_MONOTONIC=1 -UHAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC -U
 
 cd /usr/lib/python2.7
 python -O -m compileall -q
-python -OO -m compileall -q
+python -m compileall -q
 
 find -name "*.so" | while read f; do strip \$f; done
 
@@ -498,7 +498,7 @@ python -O -m pip install pyuv --no-binary :all:
 
 cd /usr/lib/python2.7
 python -O -m compileall -q
-python -OO -m compileall -q
+python -m compileall -q
 
 find -name "*.so" | while read f; do strip \$f; done
 
diff --git a/client/sources/buildenv.sh b/client/sources/buildenv.sh
index 044c9f5b..59dca464 100755
--- a/client/sources/buildenv.sh
+++ b/client/sources/buildenv.sh
@@ -157,6 +157,7 @@ for prefix in $WINE32 $WINE64; do
     WINEPREFIX=$prefix wine C:\\Python27\\python -O -m pip install --upgrade $PACKAGES
     WINEPREFIX=$prefix wine C:\\Python27\\python -O -m pip install --upgrade --no-binary :all: psutil
     WINEPREFIX=$prefix wine C:\\Python27\\python -O -m compileall -q C:\\Python27\\Lib || true
+    WINEPREFIX=$prefix wine C:\\Python27\\python -m compileall -q C:\\Python27\\Lib || true
 done
 
 # WINEPREFIX=$WINE32 wine C:\\Python27\\python.exe -m easy_install -Z $PYWIN32
diff --git a/pupy/conf/pupyenv.sh b/pupy/conf/pupyenv.sh
index 5fd808a3..f6b98427 100755
--- a/pupy/conf/pupyenv.sh
+++ b/pupy/conf/pupyenv.sh
@@ -48,8 +48,8 @@ cd /opt/pupy
 
 find -type f -exec md5sum {} ';' >/projects/integrity.txt
 
-python -O -m compileall -qf 1>/dev/null 2>/dev/null
-python -OO -m compileall -qf 1>/dev/null 2>/dev/null
+python -m compileall . -qf 1>/dev/null 2>/dev/null
+python -O -m compileall . -qf 1>/dev/null 2>/dev/null
 
 echo 'Copy your authorized_keys here!' >/projects/keys/README