--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,6 +66,7 @@ ${CMAKE_CURRENT_BINARY_DIR}/config.h
 configure_file(
 ${CMAKE_CURRENT_SOURCE_DIR}/lasi.pc.in
 ${CMAKE_CURRENT_BINARY_DIR}/lasi.pc
+@ONLY
 )
 
 install(FILES
--- a/lasi.pc.in
+++ b/lasi.pc.in
@@ -1,6 +1,6 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
-libdir=@libdir@
+libdir=${exec_prefix}/@libdir@
 includedir=@includedir@
 
 Name: LASi