diff --git a/cmake/FindIgnOGRE.cmake b/cmake/FindIgnOGRE.cmake
index e00f619..6825eb2 100644
--- a/cmake/FindIgnOGRE.cmake
+++ b/cmake/FindIgnOGRE.cmake
@@ -99,15 +99,12 @@ if (NOT WIN32)
         set (OGRE_FOUND false)
       else ()
         # set library dirs if the value is empty
-        if (NOT ${OGRE_LIBRARY_DIRS} OR ${OGRE_LIBRARY_DIRS} STREQUAL "")
-          execute_process(COMMAND pkg-config --variable=libdir OGRE
-                          OUTPUT_VARIABLE _pkgconfig_invoke_result
-                          RESULT_VARIABLE _pkgconfig_failed)
-          if(_pkgconfig_failed)
+        if (NOT OGRE_LIBRARY_DIRS)
+          pkg_get_variable(OGRE_LIBRARY_DIRS OGRE libdir)
+          if(NOT OGRE_LIBRARY_DIRS)
             IGN_BUILD_WARNING ("Failed to find OGRE's library directory.  The build will succeed, but there will likely be run-time errors.")
           else()
-            # set ogre library dir and strip line break
-            set(OGRE_LIBRARY_DIRS ${_pkgconfig_invoke_result})
+            # strip line break
             string(REGEX REPLACE "\n$" "" OGRE_LIBRARY_DIRS "${OGRE_LIBRARY_DIRS}")
 
             string(FIND "${OGRE_LIBRARIES}" "${OGRE_LIBRARY_DIRS}" substr_found)
@@ -147,22 +144,18 @@ if (NOT WIN32)
       endif()
     endforeach()
 
-    execute_process(COMMAND pkg-config --variable=plugindir OGRE
-                    OUTPUT_VARIABLE _pkgconfig_invoke_result
-                    RESULT_VARIABLE _pkgconfig_failed)
-    if(_pkgconfig_failed)
+    pkg_get_variable(OGRE_PLUGINDIR OGRE plugindir)
+    if(NOT OGRE_PLUGINDIR)
       IGN_BUILD_WARNING ("Failed to find OGRE's plugin directory.  The build will succeed, but there will likely be run-time errors.")
     else()
-      # This variable will be substituted into cmake/setup.sh.in
-      set(OGRE_PLUGINDIR ${_pkgconfig_invoke_result})
+      # Seems that OGRE_PLUGINDIR can end in a newline, which will cause problems
+      # when we pass it to the compiler later.
+      string(REPLACE "\n" "" OGRE_PLUGINDIR ${OGRE_PLUGINDIR})
     endif()
 
     ign_pkg_config_library_entry(IgnOGRE OgreMain)
 
     set(OGRE_RESOURCE_PATH ${OGRE_PLUGINDIR})
-    # Seems that OGRE_PLUGINDIR can end in a newline, which will cause problems
-    # when we pass it to the compiler later.
-    string(REPLACE "\n" "" OGRE_RESOURCE_PATH ${OGRE_RESOURCE_PATH})
   endif()
 
   #reset pkg config path