diff --git a/libtomcrypt.spec b/libtomcrypt.spec
index 71f6fde..c254c1d 100644
--- a/libtomcrypt.spec
+++ b/libtomcrypt.spec
@@ -74,16 +74,14 @@ export EXTRALIBS="-ltommath"
 %install
 export INSTALL_USER=$(id -un)
 export INSTALL_GROUP=$(id -gn)
-export INCPATH="%{buildroot}%{_includedir}"
-export LIBPATH="%{buildroot}%{_libdir}"
+export INCPATH="%{_includedir}"
+export LIBPATH="%{_libdir}"
 %make_install -f makefile.shared
 
 # Fix pkgconfig path
 sed -i \
     -e 's|^prefix=.*|prefix=%{_prefix}|g' \
-    -e 's|^exec_prefix=.*|exec_prefix=%{_prefix}|g' \
     -e 's|^libdir=.*|libdir=%{_libdir}|g' \
-    -e 's|^includedir=.*|includedir=%{_includedir}|g' \
     %{buildroot}%{_libdir}/pkgconfig/%{name}.pc
 
 # Make library executable