diff --git a/build/unix/stdc++compat/Makefile.in b/build/unix/stdc++compat/Makefile.in
index bb172ab2f0a4..649d19dc604b 100644
--- a/build/unix/stdc++compat/Makefile.in
+++ b/build/unix/stdc++compat/Makefile.in
@@ -10,7 +10,6 @@ VPATH		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 LIBRARY_NAME	= stdc++compat
-DISABLED_HOST_LIBRARY_NAME = host_stdc++compat
 FORCE_STATIC_LIB= 1
 STL_FLAGS =
 NO_EXPAND_LIBS = 1
diff --git a/config/rules.mk b/config/rules.mk
index deb86b3e8dce..a8483511bbce 100644
--- a/config/rules.mk
+++ b/config/rules.mk
@@ -17,6 +17,7 @@ endif
 _MOZBUILD_EXTERNAL_VARIABLES := \
   DIRS \
   HOST_CSRCS \
+  HOST_LIBRARY_NAME \
   MODULE \
   PARALLEL_DIRS \
   TEST_DIRS \
diff --git a/js/src/config/rules.mk b/js/src/config/rules.mk
index deb86b3e8dce..a8483511bbce 100644
--- a/js/src/config/rules.mk
+++ b/js/src/config/rules.mk
@@ -17,6 +17,7 @@ endif
 _MOZBUILD_EXTERNAL_VARIABLES := \
   DIRS \
   HOST_CSRCS \
+  HOST_LIBRARY_NAME \
   MODULE \
   PARALLEL_DIRS \
   TEST_DIRS \
diff --git a/modules/libbz2/src/Makefile.in b/modules/libbz2/src/Makefile.in
index e14b16444417..fdb8b2a9fdf8 100644
--- a/modules/libbz2/src/Makefile.in
+++ b/modules/libbz2/src/Makefile.in
@@ -12,7 +12,6 @@ VPATH		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 LIBRARY_NAME	= bz2
-DISABLED_HOST_LIBRARY_NAME = hostbz2
 FORCE_STATIC_LIB= 1
 ifeq ($(OS_ARCH),WINNT)
 USE_STATIC_LIBS = 1
diff --git a/modules/libmar/src/Makefile.in b/modules/libmar/src/Makefile.in
index 59c01e80c2bb..e3db93a97925 100644
--- a/modules/libmar/src/Makefile.in
+++ b/modules/libmar/src/Makefile.in
@@ -12,7 +12,6 @@ VPATH		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 LIBRARY_NAME	= mar
-DISABLED_HOST_LIBRARY_NAME = hostmar
 FORCE_STATIC_LIB = 1
 ifeq ($(OS_ARCH),WINNT)
 USE_STATIC_LIBS = 1
diff --git a/toolkit/crashreporter/google-breakpad/src/common/Makefile.in b/toolkit/crashreporter/google-breakpad/src/common/Makefile.in
index e8f885ba5ea4..a1619416ddac 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/Makefile.in
+++ b/toolkit/crashreporter/google-breakpad/src/common/Makefile.in
@@ -13,7 +13,6 @@ LIBRARY_NAME	= breakpad_common_s
 MSVC_ENABLE_PGO := 1
 ifneq (WINNT,$(OS_TARGET))
 ifdef MOZ_CRASHREPORTER
-DISABLED_HOST_LIBRARY_NAME = host_breakpad_common_s
 endif
 endif
 
diff --git a/toolkit/crashreporter/google-breakpad/src/common/dwarf/Makefile.in b/toolkit/crashreporter/google-breakpad/src/common/dwarf/Makefile.in
index 136b9b74dd47..1c5b9d73dad7 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/dwarf/Makefile.in
+++ b/toolkit/crashreporter/google-breakpad/src/common/dwarf/Makefile.in
@@ -10,7 +10,6 @@ VPATH		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 ifdef MOZ_CRASHREPORTER
-DISABLED_HOST_LIBRARY_NAME = host_breakpad_dwarf_s
 
 LOCAL_INCLUDES 	= -I$(srcdir)/../..
 
diff --git a/toolkit/crashreporter/google-breakpad/src/common/linux/Makefile.in b/toolkit/crashreporter/google-breakpad/src/common/linux/Makefile.in
index 3e0609e0fb3c..3613d4415be3 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/linux/Makefile.in
+++ b/toolkit/crashreporter/google-breakpad/src/common/linux/Makefile.in
@@ -11,7 +11,6 @@ include $(DEPTH)/config/autoconf.mk
 
 LIBRARY_NAME	= breakpad_linux_common_s
 ifdef MOZ_CRASHREPORTER
-DISABLED_HOST_LIBRARY_NAME = host_breakpad_linux_common_s
 endif
 
 LOCAL_INCLUDES = \
diff --git a/toolkit/crashreporter/google-breakpad/src/common/mac/Makefile.in b/toolkit/crashreporter/google-breakpad/src/common/mac/Makefile.in
index 6f0b199f4911..f78d27d9735d 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/mac/Makefile.in
+++ b/toolkit/crashreporter/google-breakpad/src/common/mac/Makefile.in
@@ -10,7 +10,6 @@ VPATH		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 LIBRARY_NAME	= breakpad_mac_common_s
-DISABLED_HOST_LIBRARY_NAME = host_breakpad_mac_common_s
 
 LOCAL_INCLUDES 	= -I$(srcdir)/../..
 
diff --git a/toolkit/crashreporter/google-breakpad/src/common/solaris/Makefile.in b/toolkit/crashreporter/google-breakpad/src/common/solaris/Makefile.in
index b514f737bb2a..3a4be333ea83 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/solaris/Makefile.in
+++ b/toolkit/crashreporter/google-breakpad/src/common/solaris/Makefile.in
@@ -10,7 +10,6 @@ VPATH		= @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 LIBRARY_NAME	= breakpad_solaris_common_s
-DISABLED_HOST_LIBRARY_NAME = host_breakpad_solaris_common_s
 
 LOCAL_INCLUDES 	= -I$(srcdir)/../..