diff --git a/pyirt/utl/__init__.py b/pyirt/utl/__init__.py
index 173ec00..196185c 100644
--- a/pyirt/utl/__init__.py
+++ b/pyirt/utl/__init__.py
@@ -4,5 +4,5 @@
 from . import loader
 
 import pyximport
-pyximport.install(build_in_temp=True)
+pyximport.install(build_dir="/tmp/pyximport/", build_in_temp=True)
 from . import clib