File dwm-6.1-config.patch of Package dwm
diff -Naur dwm-6.1/config.mk dwm/config.mk
--- dwm-6.1/config.mk 2017-11-21 10:11:41.288254304 +0100
+++ dwm/config.mk 2017-11-21 10:35:16.347954653 +0100
@@ -4,7 +4,7 @@
# Customize below to fit your system
# paths
-PREFIX = /usr/local
+PREFIX = /usr
MANPREFIX = ${PREFIX}/share/man
X11INC = /usr/X11R6/include