Install systemd units into /lib instead of /usr/lib
--- a/misc/systemd/local.mk
+++ b/misc/systemd/local.mk
@@ -1,5 +1,5 @@
 ifeq ($(OS), Linux)
 
-  $(foreach n, nix-daemon.socket nix-daemon.service, $(eval $(call install-file-in, $(d)/$(n), $(prefix)/lib/systemd/system, 0644)))
+  $(foreach n, nix-daemon.socket nix-daemon.service, $(eval $(call install-file-in, $(d)/$(n), /lib/systemd/system, 0644)))
 
 endif