diff -r -U2 GPXLab-0.7.0.orig/GPXLab/GPXLab.pro GPXLab-0.7.0/GPXLab/GPXLab.pro
--- GPXLab-0.7.0.orig/GPXLab/GPXLab.pro	2019-12-11 15:44:11.000000000 +0700
+++ GPXLab-0.7.0/GPXLab/GPXLab.pro	2021-03-25 17:03:19.093288969 +0700
@@ -140,5 +140,5 @@
 
 unix:!macx {
-    isEmpty(PREFIX):PREFIX = /usr/local
+    isEmpty(PREFIX):PREFIX = /usr
     DEFINES += PREFIX=\\\"$$PREFIX\\\"