diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 125b469f4..7b533a472 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -1,3 +1,2 @@
 [Hook Scripts]
-versioner = tools/versioner/preupload.sh
 notice = tools/update_notice.sh
diff --git a/libc/Android.bp b/libc/Android.bp
index 5d0e8c7e9..9bba77698 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -2036,15 +2036,12 @@ cc_object {
     defaults: ["crt_defaults"],
 }
 
-// The following module lives in prebuilts/ndk because we need to preprocess the
-// headers to include ifdef guards for __ANDROID_API__. Update with
-// bionic/tools/update_headers.sh.
-// ndk_headers {
-//     name: "common_libc",
-//     from: "include",
-//     to: "",
-//     srcs: ["include/**/*.h"],
-// }
+preprocessed_ndk_headers {
+    name: "common_libc",
+    from: "include",
+    to: "",
+    license: "NOTICE",
+}
 
 ndk_headers {
     name: "libc_uapi",
diff --git a/libc/versioner-dependencies/arm/arch-arm b/libc/versioner-dependencies/arm/arch-arm
new file mode 120000
index 000000000..cc94225a7
--- /dev/null
+++ b/libc/versioner-dependencies/arm/arch-arm
@@ -0,0 +1 @@
+../../arch-arm/include/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/arm/kernel_uapi_asm-arm b/libc/versioner-dependencies/arm/kernel_uapi_asm-arm
new file mode 120000
index 000000000..3c7584dec
--- /dev/null
+++ b/libc/versioner-dependencies/arm/kernel_uapi_asm-arm
@@ -0,0 +1 @@
+../../kernel/uapi/asm-arm
\ No newline at end of file
diff --git a/libc/versioner-dependencies/arm64/arch-arm64 b/libc/versioner-dependencies/arm64/arch-arm64
new file mode 120000
index 000000000..2d9128afd
--- /dev/null
+++ b/libc/versioner-dependencies/arm64/arch-arm64
@@ -0,0 +1 @@
+../../arch-arm64/include/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/arm64/kernel_uapi_asm-arm64 b/libc/versioner-dependencies/arm64/kernel_uapi_asm-arm64
new file mode 120000
index 000000000..7ee6fd21f
--- /dev/null
+++ b/libc/versioner-dependencies/arm64/kernel_uapi_asm-arm64
@@ -0,0 +1 @@
+../../kernel/uapi/asm-arm64
\ No newline at end of file
diff --git a/libc/versioner-dependencies/common/clang-builtins b/libc/versioner-dependencies/common/clang-builtins
new file mode 120000
index 000000000..7bd481c94
--- /dev/null
+++ b/libc/versioner-dependencies/common/clang-builtins
@@ -0,0 +1 @@
+../../../../external/clang/lib/Headers/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/common/kernel_android_uapi b/libc/versioner-dependencies/common/kernel_android_uapi
new file mode 120000
index 000000000..fd7831572
--- /dev/null
+++ b/libc/versioner-dependencies/common/kernel_android_uapi
@@ -0,0 +1 @@
+../../kernel/android/uapi/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/common/kernel_uapi b/libc/versioner-dependencies/common/kernel_uapi
new file mode 120000
index 000000000..d5cb8eec1
--- /dev/null
+++ b/libc/versioner-dependencies/common/kernel_uapi
@@ -0,0 +1 @@
+../../kernel/uapi/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/mips/arch-mips b/libc/versioner-dependencies/mips/arch-mips
new file mode 120000
index 000000000..56ed02144
--- /dev/null
+++ b/libc/versioner-dependencies/mips/arch-mips
@@ -0,0 +1 @@
+../../arch-mips/include/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/mips/kernel_uapi_asm-mips b/libc/versioner-dependencies/mips/kernel_uapi_asm-mips
new file mode 120000
index 000000000..94bb3db75
--- /dev/null
+++ b/libc/versioner-dependencies/mips/kernel_uapi_asm-mips
@@ -0,0 +1 @@
+../../kernel/uapi/asm-mips
\ No newline at end of file
diff --git a/libc/versioner-dependencies/mips64/arch-mips64 b/libc/versioner-dependencies/mips64/arch-mips64
new file mode 120000
index 000000000..4893b5748
--- /dev/null
+++ b/libc/versioner-dependencies/mips64/arch-mips64
@@ -0,0 +1 @@
+../../arch-mips64/include/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/mips64/kernel_uapi_asm-mips b/libc/versioner-dependencies/mips64/kernel_uapi_asm-mips
new file mode 120000
index 000000000..94bb3db75
--- /dev/null
+++ b/libc/versioner-dependencies/mips64/kernel_uapi_asm-mips
@@ -0,0 +1 @@
+../../kernel/uapi/asm-mips
\ No newline at end of file
diff --git a/libc/versioner-dependencies/x86/arch-x86 b/libc/versioner-dependencies/x86/arch-x86
new file mode 120000
index 000000000..64263842a
--- /dev/null
+++ b/libc/versioner-dependencies/x86/arch-x86
@@ -0,0 +1 @@
+../../arch-x86/include/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/x86/kernel_uapi_asm-x86 b/libc/versioner-dependencies/x86/kernel_uapi_asm-x86
new file mode 120000
index 000000000..1b7a73dda
--- /dev/null
+++ b/libc/versioner-dependencies/x86/kernel_uapi_asm-x86
@@ -0,0 +1 @@
+../../kernel/uapi/asm-x86/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/x86_64/arch-x86_64 b/libc/versioner-dependencies/x86_64/arch-x86_64
new file mode 120000
index 000000000..684d74eba
--- /dev/null
+++ b/libc/versioner-dependencies/x86_64/arch-x86_64
@@ -0,0 +1 @@
+../../arch-x86_64/include/
\ No newline at end of file
diff --git a/libc/versioner-dependencies/x86_64/kernel_uapi_asm-x86 b/libc/versioner-dependencies/x86_64/kernel_uapi_asm-x86
new file mode 120000
index 000000000..1b7a73dda
--- /dev/null
+++ b/libc/versioner-dependencies/x86_64/kernel_uapi_asm-x86
@@ -0,0 +1 @@
+../../kernel/uapi/asm-x86/
\ No newline at end of file
diff --git a/tools/update_headers.sh b/tools/update_headers.sh
deleted file mode 100755
index 0095d5065..000000000
--- a/tools/update_headers.sh
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/bin/bash
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-cd $DIR
-
-which versioner >/dev/null 2>&1
-if [ $? -ne 0 ]; then
-  >&2 echo "versioner not in path; run mma in $DIR/versioner"
-  exit 1
-fi
-
-VERSION=$(git rev-parse --short HEAD)
-git diff-index --quiet HEAD
-DIRTY=$?
-git branch -r --contains HEAD | grep -q aosp/master
-SUBMITTED=$?
-
-if [ $DIRTY -ne 0 ]; then
-  >&2 echo "Warning: bionic has uncommitted changes"
-  VERSION="${VERSION}-dirty"
-elif [ $SUBMITTED -ne 0 ]; then
-  >&2 echo "Warning: current HEAD does not exist in aosp/master"
-  VERSION="${VERSION}-unsubmitted"
-fi
-
-PREBUILTS_DIR=$ANDROID_BUILD_TOP/prebuilts/ndk
-BRANCH_NAME=$(git -C $PREBUILTS_DIR symbolic-ref --short -q HEAD)
-if [ $? -ne 0 ]; then
-  BRANCH_NAME=update-bionic-headers-$VERSION
-  echo "prebuilts/ndk has detached head; creating branch $BRANCH_NAME"
-  repo start $BRANCH_NAME $PREBUILTS_DIR
-else
-  echo "prebuilts/ndk already on branch $BRANCH_NAME"
-fi
-
-HEADERS_INSTALL=$PREBUILTS_DIR/headers
-if [ -d "$HEADERS_INSTALL" ]; then
-  git -C $PREBUILTS_DIR rm -r --ignore-unmatch $HEADERS_INSTALL
-  if [ -d $HEADERS_INSTALL ]; then
-    rm -r $HEADERS_INSTALL
-  fi
-fi
-
-versioner -p versioner/platforms versioner/current versioner/dependencies \
-  -o $HEADERS_INSTALL
-if [ $? -ne 0 ]; then
-  >&2 echo "Header preprocessing failed"
-  exit 1
-fi
-
-cp ../libc/NOTICE $PREBUILTS_DIR
-
-git -C $PREBUILTS_DIR add $HEADERS_INSTALL $PREBUILTS_DIR/NOTICE
-git -C $PREBUILTS_DIR commit -m "Update bionic headers to $VERSION."
diff --git a/tools/versioner/dependencies/arm/arch-arm b/tools/versioner/dependencies/arm/arch-arm
deleted file mode 120000
index ed69f41b1..000000000
--- a/tools/versioner/dependencies/arm/arch-arm
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/arch-arm/include
\ No newline at end of file
diff --git a/tools/versioner/dependencies/arm/kernel_uapi_asm-arm b/tools/versioner/dependencies/arm/kernel_uapi_asm-arm
deleted file mode 120000
index fabed85af..000000000
--- a/tools/versioner/dependencies/arm/kernel_uapi_asm-arm
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi/asm-arm
\ No newline at end of file
diff --git a/tools/versioner/dependencies/arm64/arch-arm64 b/tools/versioner/dependencies/arm64/arch-arm64
deleted file mode 120000
index 21a21d4a0..000000000
--- a/tools/versioner/dependencies/arm64/arch-arm64
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/arch-arm64/include
\ No newline at end of file
diff --git a/tools/versioner/dependencies/arm64/kernel_uapi_asm-arm64 b/tools/versioner/dependencies/arm64/kernel_uapi_asm-arm64
deleted file mode 120000
index 16e74a3e5..000000000
--- a/tools/versioner/dependencies/arm64/kernel_uapi_asm-arm64
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi/asm-arm64
\ No newline at end of file
diff --git a/tools/versioner/dependencies/common/clang-builtins b/tools/versioner/dependencies/common/clang-builtins
deleted file mode 120000
index fc27e65b2..000000000
--- a/tools/versioner/dependencies/common/clang-builtins
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../external/clang/lib/Headers
\ No newline at end of file
diff --git a/tools/versioner/dependencies/common/kernel_android_uapi b/tools/versioner/dependencies/common/kernel_android_uapi
deleted file mode 120000
index bcf6daa69..000000000
--- a/tools/versioner/dependencies/common/kernel_android_uapi
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/android/uapi
\ No newline at end of file
diff --git a/tools/versioner/dependencies/common/kernel_uapi b/tools/versioner/dependencies/common/kernel_uapi
deleted file mode 120000
index 2a915efb9..000000000
--- a/tools/versioner/dependencies/common/kernel_uapi
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi
\ No newline at end of file
diff --git a/tools/versioner/dependencies/mips/arch-mips b/tools/versioner/dependencies/mips/arch-mips
deleted file mode 120000
index 7f2f10410..000000000
--- a/tools/versioner/dependencies/mips/arch-mips
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/arch-mips/include
\ No newline at end of file
diff --git a/tools/versioner/dependencies/mips/kernel_uapi_asm-mips b/tools/versioner/dependencies/mips/kernel_uapi_asm-mips
deleted file mode 120000
index dcd1955af..000000000
--- a/tools/versioner/dependencies/mips/kernel_uapi_asm-mips
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi/asm-mips
\ No newline at end of file
diff --git a/tools/versioner/dependencies/mips64/arch-mips64 b/tools/versioner/dependencies/mips64/arch-mips64
deleted file mode 120000
index 48cea7234..000000000
--- a/tools/versioner/dependencies/mips64/arch-mips64
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/arch-mips64/include
\ No newline at end of file
diff --git a/tools/versioner/dependencies/mips64/kernel_uapi_asm-mips b/tools/versioner/dependencies/mips64/kernel_uapi_asm-mips
deleted file mode 120000
index dcd1955af..000000000
--- a/tools/versioner/dependencies/mips64/kernel_uapi_asm-mips
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi/asm-mips
\ No newline at end of file
diff --git a/tools/versioner/dependencies/x86/arch-x86 b/tools/versioner/dependencies/x86/arch-x86
deleted file mode 120000
index d0f016a09..000000000
--- a/tools/versioner/dependencies/x86/arch-x86
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/arch-x86/include
\ No newline at end of file
diff --git a/tools/versioner/dependencies/x86/kernel_uapi_asm-x86 b/tools/versioner/dependencies/x86/kernel_uapi_asm-x86
deleted file mode 120000
index 0efae62b7..000000000
--- a/tools/versioner/dependencies/x86/kernel_uapi_asm-x86
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi/asm-x86
\ No newline at end of file
diff --git a/tools/versioner/dependencies/x86_64/arch-x86_64 b/tools/versioner/dependencies/x86_64/arch-x86_64
deleted file mode 120000
index deb647d21..000000000
--- a/tools/versioner/dependencies/x86_64/arch-x86_64
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/arch-x86_64/include
\ No newline at end of file
diff --git a/tools/versioner/dependencies/x86_64/kernel_uapi_asm-x86 b/tools/versioner/dependencies/x86_64/kernel_uapi_asm-x86
deleted file mode 120000
index 0efae62b7..000000000
--- a/tools/versioner/dependencies/x86_64/kernel_uapi_asm-x86
+++ /dev/null
@@ -1 +0,0 @@
-../../../../libc/kernel/uapi/asm-x86
\ No newline at end of file
diff --git a/tools/versioner/preupload.sh b/tools/versioner/preupload.sh
deleted file mode 100755
index 45d6cca46..000000000
--- a/tools/versioner/preupload.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/bin/bash
-
-if ! which versioner > /dev/null; then
-  echo "versioner not found (lunch and mma in bionic)"
-  exit 1
-fi
-
-versioner -r arm -r arm64
-exit $?
diff --git a/tools/versioner/src/Android.bp b/tools/versioner/src/Android.bp
index d1362d094..c5afa56d0 100644
--- a/tools/versioner/src/Android.bp
+++ b/tools/versioner/src/Android.bp
@@ -41,18 +41,8 @@ cc_binary_host {
                 "-fno-rtti",
             ],
         },
-        darwin: {
-            enabled: false,
-        },
         windows: {
             enabled: false,
         },
     },
-
-    product_variables: {
-        unbundled_build: {
-            // Only do this when Clang is available.
-            enabled: false,
-        },
-    },
 }