--- GLC_lib.pro.orig	2020-05-23 09:44:46.000000000 -0700
+++ GLC_lib.pro	2020-05-23 09:45:23.000000000 -0700
@@ -424,8 +424,8 @@
 # Linux and macx install configuration
 unix {
     # Location of HEADERS and library
-    LIB_DIR = /usr/local/lib
-    INCLUDE_DIR = /usr/local/include
+    LIB_DIR = @@PREFIX@@/lib
+    INCLUDE_DIR = @@PREFIX@@/include
     # Adds a -P to preserve link
 	QMAKE_COPY_FILE = $${QMAKE_COPY_FILE} -P
 	include.path = $${INCLUDE_DIR}/GLC_lib