diff --git a/core/Makefile b/core/Makefile
index ef745c6..2af421d 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1306,10 +1306,6 @@
   $(HOST_OUT_JAVA_LIBRARIES)/BootSignature.jar \
   $(HOST_OUT_EXECUTABLES)/mkuserimg.sh \
   $(HOST_OUT_EXECUTABLES)/make_ext4fs \
-  $(HOST_OUT_EXECUTABLES)/mksquashfsimage.sh \
-  $(HOST_OUT_EXECUTABLES)/mksquashfs \
-  $(HOST_OUT_EXECUTABLES)/mkf2fsuserimg.sh \
-  $(HOST_OUT_EXECUTABLES)/make_f2fs \
   $(HOST_OUT_EXECUTABLES)/simg2img \
   $(HOST_OUT_EXECUTABLES)/e2fsck \
   $(HOST_OUT_EXECUTABLES)/build_verity_tree \
diff --git a/core/clang/HOST_x86_common.mk b/core/clang/HOST_x86_common.mk
index d151e99..74b5a69 100644
--- a/core/clang/HOST_x86_common.mk
+++ b/core/clang/HOST_x86_common.mk
@@ -11,8 +11,7 @@
 ifeq ($(HOST_OS),linux)
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
-  --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
-  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin
+  --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot
 
 CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CFLAGS := \
   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)
diff --git a/target/product/core.mk b/target/product/core.mk
index d453303..abb4c05 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -33,7 +33,6 @@
     DownloadProviderUi \
     Email \
     ExactCalculator \
-    Exchange2 \
     ExternalStorageProvider \
     FusedLocation \
     InputDevices \