--- ./Makefile.rules.orig	2021-03-02 15:12:10.000000000 +0000
+++ ./Makefile.rules	2021-06-10 19:13:39.230787541 +0000
@@ -484,9 +484,7 @@
 
 LTINSTALL=$(LIBTOOL) --mode=install $(INSTALL)
 
-install:
-	@echo "Error, 'make install' has not yet been implemented"
-	exit 1
+install: install-libgap install-headers install-bin install-gaproot install-pkg
 
 # the following is wrapper script which is installed by the install-bin target
 define gap_wrapper
@@ -498,13 +496,13 @@
 install-bin:
 	@echo "Warning, 'make install-bin' is incomplete"
 	$(INSTALL) -d -m 0755 $(DESTDIR)$(bindir)
-	$(INSTALL) -m 0755 gap $(DESTDIR)$(bindir)/gap.real
-	echo "$$gap_wrapper" > gap-wrapper.sh
+	$(INSTALL) -m 0755 gap $(PREFIX)/libexec/gap.real
+	echo -e "#!@TERMUX_PREFIX@/bin/sh\nexec \"$(PREFIX)/libexec/gap.real\" -l \"$(datarootdir)/gap\" "'"$$@"' > gap-wrapper.sh
 	$(INSTALL) -m 0755 gap-wrapper.sh $(DESTDIR)$(bindir)/gap
 	# TODO: make gac installable; this requires adjusting path in it, and
 	# installing the libtool script generated by configure somewhere; and then
 	# putting that path to it into gac)
-	#$(INSTALL) gac $(DESTDIR)$(bindir)
+	$(INSTALL) gac $(DESTDIR)$(bindir)
 
 install-gaproot:
 	@echo "Warning, 'make install-gaproot' is incomplete"
@@ -544,6 +542,7 @@
 	$(INSTALL) -d -m 0755 $(DESTDIR)$(includedir)/gap/hpc
 	$(INSTALL) -m 0644 $(srcdir)/src/hpc/*.h $(DESTDIR)$(includedir)/gap/hpc
 	# TODO: take care of config.h, this is difficult
+	$(INSTALL) -m 0644 gen/config.h $(DESTDIR)$(includedir)/gap
 
 install-libgap: libgap.la
 	@echo "Warning, 'make install-libgap' is incomplete"
