--- a/Makefile
+++ b/Makefile
@@ -6,9 +6,9 @@
 
 ZIG ?= zig
 
-PREFIX ?= /usr/local
+PREFIX ?= /usr
 BINDIR ?= ${PREFIX}/bin
-MANDIR ?= ${PREFIX}/share/man/man1
+MANDIR ?= ${PREFIX}/man/man1
 ZIG_FLAGS ?= --release=fast -Dstrip
 
 NCDU_VERSION=$(shell grep 'program_version = "' src/main.zig | sed -e 's/^.*"\(.\+\)".*$$/\1/')