diff --git a/tests/project.conf b/tests/project.conf
index 0ff00f2..3d01348 100644
--- a/tests/project.conf
+++ b/tests/project.conf
@@ -21,7 +21,7 @@ depends=../src/buffer.c
 
 [clint.log]
 type=script
-script=./clint.sh -O CPPFLAGS="-I../include `pkg-config --cflags python-2.7`"
+script=./clint.sh -O CPPFLAGS="-I$(DESTDIR)$(PREFIX)/include -I../include `pkg-config --cflags python-2.7`"
 depends=$(OBJDIR)../src/libSystem.a,clint.sh
 
 [config]