--- a/mcs/class/reference-assemblies/Makefile	2019-01-02 10:25:41.011999700 +0100
+++ b/mcs/class/reference-assemblies/Makefile	2019-01-02 10:27:20.591632515 +0100
@@ -10,29 +10,11 @@
 	$(MAKE) -C ../../../external/binary-reference-assemblies CSC="MONO_PATH=$(abspath $(topdir)/class/lib/$(BUILD_TOOLS_PROFILE)) $(INTERNAL_CSC)"
 
 install-local:
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/2.0-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/3.5-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.0-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5.1-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5.2-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.6-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.6.1-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.6.2-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.7-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.7.1-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.7.2-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.8-api
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5.1-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5.2-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.6-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.6.1-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.6.2-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.7-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.7.1-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.7.2-api/Facades
-	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.8-api/Facades
+	$(MKINSTALLDIRS) $(PROFILE_DIR)/4.5
+	ln -sf 4.5 $(PROFILE_DIR)/4.7-api
+	ln -sf 4.5 $(PROFILE_DIR)/4.6-api
+	ln -sf 4.5 $(PROFILE_DIR)/4.5-api
+	ln -sf 4.5 $(PROFILE_DIR)/4.0-api
 
 	$(INSTALL_LIB) ../../../external/binary-reference-assemblies/v2.0/*.dll $(PROFILE_DIR)/2.0-api
 	$(INSTALL_LIB) ../../../external/binary-reference-assemblies/v3.5/*.dll $(PROFILE_DIR)/3.5-api
--- a/mcs/Makefile	2018-03-03 06:32:13.642690150 +0100
+++ b/mcs/Makefile	2018-03-03 06:32:54.699643624 +0100
@@ -43,7 +43,7 @@
 
 # fun specialty targets
 
-PROFILES = net_4_x binary_reference_assemblies xbuild_12 xbuild_14
+PROFILES = net_4_x xbuild_12 xbuild_14
 
 .PHONY: all-profiles compiler-test-profiles run-compiler-test-profiles $(STD_TARGETS:=-profiles)
 all-profiles compiler-test-profiles run-compiler-test-profiles $(STD_TARGETS:=-profiles): %-profiles: profiles-do--%
@@ -65,7 +65,6 @@
 _boot_ = all clean install
 $(_boot_:%=profile-do--xbuild_14--%):         profile-do--xbuild_14--%:         profile-do--net_4_x--%
 $(_boot_:%=profile-do--xbuild_12--%):         profile-do--xbuild_12--%:         profile-do--net_4_x--%
-$(_boot_:%=profile-do--binary_reference_assemblies--%):           profile-do--binary_reference_assemblies--%:           profile-do--build--%
 $(_boot_:%=profile-do--net_4_x--%):           profile-do--net_4_x--%:           profile-do--build--%
 $(_boot_:%=profile-do--monodroid--%):         profile-do--monodroid--%:         profile-do--build--%
 $(_boot_:%=profile-do--monodroid_tools--%):         profile-do--monodroid_tools--%:         profile-do--build--%
--- a/mcs/build/Makefile	2018-03-03 07:18:20.662959369 +0100
+++ b/mcs/build/Makefile	2018-03-03 07:18:33.303253408 +0100
@@ -18,7 +18,6 @@
 PLATFORMS = macos linux win32 unix
 PROFILES = \
 	build \
-	binary_reference_assemblies \
 	net_4_x \
 	xbuild_12 \
 	xbuild_14
--- a/runtime/Makefile.in	2018-03-03 14:06:44.691631197 +0100
+++ b/runtime/Makefile.in	2018-03-03 14:07:07.241155116 +0100
@@ -90,7 +90,7 @@
 host_triplet = @host@
 target_triplet = @target@
 @INSTALL_4_x_TRUE@am__append_1 = etc/mono/4.0/machine.config etc/mono/4.0/web.config etc/mono/4.5/web.config etc/mono/4.0/Browsers/Compat.browser etc/mono/4.5/Browsers/Compat.browser
-@INSTALL_4_x_TRUE@am__append_2 = binary_reference_assemblies net_4_x xbuild_12 xbuild_14
+@INSTALL_4_x_TRUE@am__append_2 = net_4_x xbuild_12 xbuild_14
 @INSTALL_MONODROID_TRUE@am__append_3 = monodroid monodroid_tools
 @INSTALL_MONOTOUCH_TRUE@am__append_4 = monotouch monotouch_runtime
 @INSTALL_MONOTOUCH_WATCH_TRUE@am__append_5 = monotouch_watch monotouch_watch_runtime