diff --git a/VERSION b/VERSION
index f9ef507..ac329bf 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.78
+1.0.79
diff --git a/sky130/Makefile.in b/sky130/Makefile.in
index d6f6f33..faf5480 100644
--- a/sky130/Makefile.in
+++ b/sky130/Makefile.in
@@ -14,11 +14,6 @@
 # Run "configure" from the top level directory.  Use the following
 # configuration options to match your environment:
 #
-#	--with-sky130-source-path=<path>
-#		where <path> is the location of the Google/Skywater repository
-#		cloned from https://github.com/google/skywater-pdk.  This
-#		option is mandatory and has no default.
-#
 #	--with-sky130-local-path=<path>
 #		where <path> is the run-time location of the installed PDK
 #		files generated by open_pdks.  This option is mandatory and
@@ -43,6 +38,66 @@
 #		e.g., "gds/sky130_fd_sc_hd/" with ef-style, vs.
 #		"sky130_fd_sc_hd/gds/" without it.
 #
+# Note that the following is deprecated but kept for backwards compatibility.
+# It is equivalent to "--enable-skywater-pdk=<path>" (see below).
+#
+#	--with-sky130-source-path=<path>
+#		where <path> is the location of the Google/Skywater repository
+#		cloned from https://github.com/google/skywater-pdk.  This
+#		option is mandatory and has no default.
+#
+# Enable/disable for specific libraries to be installed (and downloaded if
+# needed).  Libraries that are part of the open_pdks repository are enabled
+# by default and must be disabled by passing an option to configure.  Libraries
+# that are not part of the open_pdks repository are disabled by default and
+# must be enabled by passing an option to configure.
+#
+# Internal libraries and tool setups that can be disabled are the following:
+#
+#	--disable-magic
+#		Do not install setup files for the magic layout tool.
+#
+#	--disable-netgen
+#		Do not install setup files for the netgen LVS tool.
+#
+#	--disable-qflow
+#		Do not install setup files for the qflow synthesis flow.
+#
+#	--disable-openlane
+#		Do not install setup files for the openlane sythesis flow.
+#
+#	--disable-klayout
+#		Do not install setup files for the klayout layout tool.
+#
+# External libraries and tool setups that can be enabled are the following:
+#
+#	--enable-skywater-pdk[=<path>]
+#		If enabled, install the skywater PDK.  If <path> is specified,
+#		then the skywater PDK is expected to be found rooted at the
+#		given path.  If not specified, then the skywater PDK will be
+#		cloned from the git repository and installed.
+#
+#	--enable-osu-lib[=<path>]
+#		If enabled, install the OSU standard cell library.  If <path>
+#		is specified, then the OSU standard cell library is expected
+#		to be found rooted at the given path.  If not specified, then
+#		the OSU standard cell library will be cloned from the git
+#		repository and installed.
+#
+#	--enable-alpha-lib[=<path>]
+#		If enabled, install the alphanumeric library.  If <path> is
+#		specified, then the alphanumeric library is expected to be
+#		found rooted at the given path.  If not specified, then the
+#		alphanumeric library will be cloned from the git repository
+#		and installed.
+#
+#	--enable-xschem[=<path>]
+#		If enabled, install the Sky130 setup for the xschem schematic
+#		editor.  If <path> is specified, then the xschem setup is
+#		expected to be found rooted at the given path.  If not
+#		specified, then the xschem setup will be cloned from the
+#		repository and installed.
+#
 # The variables below are substituted from the configuration options:
 #
 #	SKYWATER_PATH: points to vendor sources
diff --git a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_10um.lef b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_10um.lef
index 86e1f68..edd3e5c 100644
--- a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_10um.lef
+++ b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_10um.lef
@@ -273,7 +273,8 @@
   END VSSIO_Q
   OBS
       LAYER met4 ;
-        RECT 0.000 66.900 10.000 197.965 ;
+        RECT 0.000 66.900 10.000 95.000 ;
+        RECT 0.000 172.000 10.000 197.965 ;
         RECT 0.000 61.050 10.000 61.650 ;
         RECT 0.000 55.100 10.000 55.800 ;
         RECT 0.000 49.710 10.000 50.690 ;
diff --git a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_1um.lef b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_1um.lef
index 3da568d..eda24eb 100644
--- a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_1um.lef
+++ b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_1um.lef
@@ -165,7 +165,8 @@
   END VSSIO_Q
   OBS
       LAYER met4 ;
-        RECT 0.000 66.900 1.000 197.965 ;
+        RECT 0.000 66.900 1.000 95.000 ;
+        RECT 0.000 172.000 1.000 197.965 ;
         RECT 0.000 61.050 1.000 61.650 ;
         RECT 0.000 55.100 1.000 55.800 ;
         RECT 0.000 49.710 1.000 50.690 ;
diff --git a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_20um.lef b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_20um.lef
index fe3e2c8..6a0a1f0 100644
--- a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_20um.lef
+++ b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_20um.lef
@@ -273,7 +273,8 @@
   END VSSIO_Q
   OBS
       LAYER met4 ;
-        RECT 0.000 66.900 20.000 197.965 ;
+        RECT 0.000 66.900 20.000 95.000 ;
+        RECT 0.000 172.000 20.000 197.965 ;
         RECT 0.000 61.050 20.000 61.650 ;
         RECT 0.000 55.100 20.000 55.800 ;
         RECT 0.000 49.710 20.000 50.690 ;
diff --git a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_5um.lef b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_5um.lef
index c2bf694..9dbaffb 100644
--- a/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_5um.lef
+++ b/sky130/custom/sky130_fd_io/lef/sky130_ef_io__com_bus_slice_5um.lef
@@ -273,7 +273,8 @@
   END VSSIO_Q
   OBS
       LAYER met4 ;
-        RECT 0.000 66.900 5.000 197.965 ;
+        RECT 0.000 66.900 5.000 95.000 ;
+        RECT 0.000 172.000 5.000 197.965 ;
         RECT 0.000 61.050 5.000 61.650 ;
         RECT 0.000 55.100 5.000 55.800 ;
         RECT 0.000 49.710 5.000 50.690 ;