diff -up src/module_list.py.orig src/module_list.py --- src/module_list.py.orig 2015-04-03 15:08:44.096404759 -0300 +++ src/module_list.py 2015-04-03 15:08:56.856405247 -0300 @@ -2229,7 +2229,7 @@ if UNAME[0] == "Darwin" and not UNAME[2] ) -if is_package_installed('lrcalc'): +if 1: ext_modules.append( Extension('sage.libs.lrcalc.lrcalc', sources = ["sage/libs/lrcalc/lrcalc.pyx"],