diff --git a/libftdi.spec b/libftdi.spec
index 5a77f51..96101e5 100644
--- a/libftdi.spec
+++ b/libftdi.spec
@@ -71,7 +71,7 @@ sed -i -e 's/GROUP="plugdev"/TAG+="uaccess"/g' packages/99-libftdi.rules
 
 
 %build
-export CMAKE_PREFIX_PATH=/usr
+export CMAKE_PREFIX_PATH=%{_prefix}
 
 mkdir build-py3 && pushd build-py3
 %{cmake} -DPython_ADDITIONAL_VERSIONS=%{python3_version} ..