Revert "remove non working param"

This reverts commit e72b05b8.

component/boost-lib/buildout.cfg

@@ -13,8 +13,7 @@ shared = true
 url = http://downloads.sourceforge.net/sourceforge/boost/boost_1_67_0.tar.bz2
 md5sum = ced776cb19428ab8488774e1415535ab
 location = @@LOCATION@@
-configure-command = ./bootstrap.sh --prefix=${:location} --without-icu 
-#$${PYTHON:+--with-python=$PYTHON}
+configure-command = ./bootstrap.sh --prefix=${:location} --without-icu $${PYTHON:+--with-python=$PYTHON}
 make-binary =
 make-options =
 make-targets = for a in $MAKEFLAGS; do case $a in -j*) j=$a; break;; esac; done;