diff --git a/src/mkfile b/src/mkfile
index b89f699..2759792 100644
--- a/src/mkfile
+++ b/src/mkfile
@@ -28,6 +28,7 @@
 	) | sed '
 		s/'$SYSNAME'/$SYSNAME/g
 		s/'$OBJTYPE'/$OBJTYPE/g
+		s;'$PLAN9';$PLAN9;g
 		s/`membername \$newprereq`/*.o/g
 		s/9[ac] *getcallerpc-.*/9a getcallerpc-$OBJTYPE.s || 9c getcallerpc-$OBJTYPE.c/
 		s/^9[ac] *tas-.*/9a tas-$OBJTYPE.s || 9c tas-$OBJTYPE.c/
diff --git a/src/mkmk.sh b/src/mkmk.sh
index 914a42a..37c4392 100644
--- a/src/mkmk.sh
+++ b/src/mkmk.sh
@@ -193,6 +193,6 @@
 9c  varsub.c
 9c  word.c
 9c  unix.c
-9l -o o.mk arc.o archive.o bufblock.o env.o file.o graph.o job.o lex.o main.o match.o mk.o parse.o recipe.o rule.o run.o sh.o shprint.o symtab.o var.o varsub.o word.o unix.o /Users/rsc/plan9/lib/libregexp9.a /Users/rsc/plan9/lib/libbio.a /Users/rsc/plan9/lib/lib9.a 
-install -c o.mk /Users/rsc/plan9/bin/mk
+9l -o o.mk arc.o archive.o bufblock.o env.o file.o graph.o job.o lex.o main.o match.o mk.o parse.o recipe.o rule.o run.o sh.o shprint.o symtab.o var.o varsub.o word.o unix.o $PLAN9/lib/libregexp9.a $PLAN9/lib/libbio.a $PLAN9/lib/lib9.a 
+install -c o.mk $PLAN9/bin/mk
 cd ..