diff --git a/tools/Makefile b/tools/Makefile
index f5b1d3e3..0479b49e 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,7 +1,13 @@
+all: elf2nso build_pfs0
+
+build_pfs0: build_pfs0.c
+	gcc -o $@ $^
+
 elf2nso: elf2nso.c sha256.c
 	gcc -o $@ $^ -llz4
 
-install: elf2nso
+install: all
+	cp build_pfs0 /usr/local/bin/
 	cp elf2nso /usr/local/bin/
 
 clean: