diff -up src/module_list.py.orig src/module_list.py
--- src/module_list.py.orig	2014-11-18 15:28:17.313130349 -0200
+++ src/module_list.py	2014-11-18 15:28:24.520130444 -0200
@@ -2210,7 +2210,7 @@ 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"],