diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a74aac..91543ae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -81,6 +81,7 @@ jobs:
           cd ..
           git clone -b $BOOST_BRANCH --depth 10 https://github.com/boostorg/boost.git boost-root
           cd boost-root
+          rm -rf libs/$LIBRARY/*
           cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
           git submodule update --init --depth 10 --jobs 2 tools/boostdep tools/inspect libs/filesystem
           python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 3" filesystem