diff --git a/mk/os161.mkdirs.mk b/mk/os161.mkdirs.mk
index 8e4fe40..370eb87 100644
--- a/mk/os161.mkdirs.mk
+++ b/mk/os161.mkdirs.mk
@@ -1,5 +1,5 @@
 #
-# MKDIRS logic
+# OS/161 build environment: MKDIRS logic
 #
 # This generates rules for all intermediate directories as well as
 # the directories listed. (That is, if you say MKDIRS=/usr/bin/foo
diff --git a/mk/os161.script.mk b/mk/os161.script.mk
new file mode 100644
index 0000000..6d579c8
--- /dev/null
+++ b/mk/os161.script.mk
@@ -0,0 +1,92 @@
+#
+# OS/161 build environment: install scripts
+#
+# Usage:
+#    TOP=../..
+#    .include "$(TOP)/mk/os161.config.mk"
+#    [defs go here]
+#    .include "$(TOP)/mk/os161.man.mk"
+#    [any extra rules go here]
+#
+# Variables controlling this file:
+#
+# EXECSCRIPTS			Executable files to install.
+# NONEXECSCRIPTS		Non-executable files to install.
+#
+# SCRIPTDIR			Directory under $(OSTREE) to install into,
+#                               e.g. /hostbin. Should have a leading slash.
+#
+
+ALLSCRIPTS=$(NONEXECSCRIPTS)
+
+# We may want these directories created. (Used by os161.baserules.mk.)
+MKDIRS+=$(MYBUILDDIR)
+MKDIRS+=$(INSTALLTOP)$(SCRIPTDIR)
+MKDIRS+=$(OSTREE)$(SCRIPTDIR)
+
+# Default rule: "build" the executable scripts. This sets the hash-bang
+# header with the interpreter path.
+# (In make the first rule found is the default.)
+all: all-local
+all-local: $(MYBUILDDIR) .WAIT
+.for S in $(EXECSCRIPTS)
+ALLSCRIPTS+=$(MYBUILDDIR)/$(S)
+all-local: $(MYBUILDDIR)/$(S)
+$(MYBUILDDIR)/$(S): $(S)
+# This must test $@, or assign another variable; it can't test $(S).
+# (This is a bmake bug.)
+.if !empty(@:M*.py)
+	echo '#!'"$(PYTHON_INTERPRETER)" > $@.new
+.else
+	sed -n -e '1p' < $(S) > $@.new
+.endif
+	sed -e '1d' < $(S) >> $@.new
+	chmod 755 $@.new
+	mv -f $@.new $@
+.endfor
+
+# depend doesn't need to do anything
+depend-local: ;
+
+#
+# Install: we can install into either $(INSTALLTOP) or $(OSTREE).
+# When building the whole system, we always install into the staging
+# area. However, if you're working on a particular program it is
+# usually convenient to be able to install it directly to $(OSTREE)
+# instead of doing a complete top-level install.
+#
+# Note that we make a hard link instead of a copy by default to reduce
+# overhead.
+#
+install-staging-local: $(INSTALLTOP)$(SCRIPTDIR) .WAIT
+
+.for _F_ in $(ALLSCRIPTS)
+install-staging-local: $(INSTALLTOP)$(SCRIPTDIR)/$(_F_:T)
+$(INSTALLTOP)$(SCRIPTDIR)/$(_F_:T): $(_F_)
+	rm -f $(.TARGET)
+	ln $(_F_) $(.TARGET) || cp $(_F_) $(.TARGET)
+.endfor
+
+install-local: $(OSTREE)$(SCRIPTDIR) .WAIT installscripts
+installscripts:
+.for _F_ in $(ALLSCRIPTS)
+	rm -f $(OSTREE)$(SCRIPTDIR)/$(_F_:T)
+	ln $(_F_) $(OSTREE)$(SCRIPTDIR)/$(_F_:T) || \
+	  cp $(_F_) $(OSTREE)$(SCRIPTDIR)/$(_F_:T)
+.endfor
+
+# clean: remove build products
+clean-local:
+.for S in $(EXECSCRIPTS)
+	rm -f $(MYBUILDDIR)/$(S)
+.endfor
+
+# Mark targets that don't represent files PHONY, to prevent various
+# lossage if files by those names appear.
+.PHONY: all all-local install-staging-local install-local installscripts
+.PHONY: clean-local
+
+# Finally, get the shared definitions for the most basic rules.
+.include "$(TOP)/mk/os161.baserules.mk"
+
+# End.