(and change pathnames and PGVERSION if neccessary).
# make
-(This makes the trigger binary and places it in /tmp with permissions 644)
+(This makes the trigger binary and places it in INSTALLDIR with permissions 644)
+
+# edit postgresql.script
+(And change the path to dupetrigger.so to INSTALLDIR)
# psql -U postgres Mir < postgresql.script
(This installs the the trigger binary and creates a new trigger.)