diff --git a/tqtinterface.spec b/tqtinterface.spec
index 7f26527..52c91ff 100644
--- a/tqtinterface.spec
+++ b/tqtinterface.spec
@@ -46,7 +46,8 @@ make %{?_smp_mflags}
 cd ../tqt.build/
 export LD_LIBRARY_PATH=%{trinity_dir}/lib:$LD_LIBRARY_PATH
 make install 
-sed -i 's#%{buildroot}##g' %buildroot%trinity_dir/lib64/*.la
+
+buildroot=%buildroot sed -i "s#$buildroot##g" %buildroot%trinity_dir/lib64/*.la
 %check