diff --git i/apps/CMakeLists.txt w/apps/CMakeLists.txt
index a6c6943..566ae82 100644
--- i/apps/CMakeLists.txt
+++ w/apps/CMakeLists.txt
@@ -87,7 +87,7 @@ if(UNIX OR APPLE)
     configure_file(${CMAKE_CURRENT_SOURCE_DIR}/pdal.pc.in
                    ${CMAKE_CURRENT_BINARY_DIR}/pdal.pc @ONLY)
     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pdal.pc
-        DESTINATION "${CMAKE_INSTALL_PREFIX}/${PDAL_LIB_INSTALL_DIR}/pkgconfig/"
+        DESTINATION "${PDAL_LIB_INSTALL_DIR}/pkgconfig/"
         PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
 
     # Autoconf compatibility variables to use the same script source.