diff --git a/vm/nga-c-no-libc/Makefile b/vm/nga-c-no-libc/Makefile
index d6093a0..0ead6c5 100644
--- a/vm/nga-c-no-libc/Makefile
+++ b/vm/nga-c-no-libc/Makefile
@@ -18,21 +18,20 @@ clean:
 bsd-i386:
 	nasm -f elf bsd-i386.s
 
-bsd-amd64:
-	nasm -f elf64 bsd-amd64.s
+bsd-amd64.o: bsd-amd64.s
+	cc -c bsd-amd64.s -o bsd-amd64.o
 
 freebsd-i386: common bsd-i386
 	cc -m32 -c retro.c
 	ld -nostdlib -m elf_i386_fbsd bsd-i386.o retro.o -o bin/retro
 
-freebsd-amd64: common bsd-amd64
+freebsd-amd64: common bsd-amd64.o
 	cc -m64 -c retro.c
-	ld -nostdlib -m elf_x86_64_fbsd bsd-amd64.o retro.o -o bin/retro
+	ld -nostdlib -no-pie -m elf_x86_64_fbsd bsd-amd64.o retro.o -o bin/retro
 
-openbsd-amd64: common
+openbsd-amd64: common bsd-amd64.o
 	cc -m64 -c retro.c
-	as openbsd.s -o openbsd.o
-	ld -nostdlib -no-pie -m elf_x86_64 openbsd.o retro.o -o bin/retro
+	ld -nostdlib -no-pie -m elf_x86_64 bsd-amd64.o retro.o -o bin/retro
 
 macos-amd64: common
 	cc -m64 -fno-pie -c retro.c
diff --git a/vm/nga-c-no-libc/openbsd.s b/vm/nga-c-no-libc/bsd-amd64.s
similarity index 100%
rename from vm/nga-c-no-libc/openbsd.s
rename to vm/nga-c-no-libc/bsd-amd64.s