--- a/source/x265.pc.in

+++ b/source/x265.pc.in

@@ -1,6 +1,6 @@

 prefix=@CMAKE_INSTALL_PREFIX@

 exec_prefix=${prefix}

-libdir=${exec_prefix}/@LIB_INSTALL_DIR@

+libdir=@LIB_INSTALL_DIR@

 includedir=${prefix}/include

 Name: @CMAKE_PROJECT_NAME@

​