diff --git a/.travis.yml b/.travis.yml
index 18da581..db097ad 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -269,7 +269,9 @@ install:
   - git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
   - cd boost-root
   - git submodule update --init tools/build
+  - git submodule update --init tools/boost_install
   - git submodule update --init libs/config
+  - git submodule update --init libs/headers
   - git submodule update --init tools/boostdep
   - mkdir -p libs/mp11
   - cp -r $TRAVIS_BUILD_DIR/* libs/mp11
diff --git a/appveyor.yml b/appveyor.yml
index 5af1a7c..675a1d5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -31,7 +31,9 @@ install:
   - git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
   - cd boost-root
   - git submodule update --init tools/build
+  - git submodule update --init tools/boost_install
   - git submodule update --init libs/config
+  - git submodule update --init libs/headers
   - git submodule update --init tools/boostdep
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\mp11\
   - python tools/boostdep/depinst/depinst.py mp11