diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5fdfa071..a2685595 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -70,6 +70,13 @@ jobs:
         with:
           python-version: ${{ matrix.config.python-version  }}
 
+      - name: Free disk space
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /opt/ghc
+          docker system prune -af || true
+
       - name: Clean workspace artifacts
         run: rm -rf build/ dist/ *.egg-info/ .eggs/
 
@@ -77,7 +84,7 @@ jobs:
         run: |
           git submodule update --init --recursive
           python -m pip install --upgrade pip
-          python -m pip install -r requirements.txt
+          python -m pip install --src deps -r requirements.txt
 
       - name: Build
         run:  python -m pip install -v .
diff --git a/.gitignore b/.gitignore
index 5a8e63f6..e70df038 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,7 @@
 /dist/
 cmake-build-*
 *.egg-info/
-src/hloc
+deps/
 
 *.npy
 *.png
diff --git a/README.md b/README.md
index 62540745..77df95bd 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ In this project, we provide interfaces for various geometric operations on 2D/3D
 To install the LIMAP Python package:
 ```
 git submodule update --init --recursive
-python -m pip install -r requirements.txt
+python -m pip install --src deps -r requirements.txt
 python -m pip install -Ive . 
 ```
 To double check if the package is successfully installed:
diff --git a/cmake/FindDependencies.cmake b/cmake/FindDependencies.cmake
index 5002595a..1714bd08 100644
--- a/cmake/FindDependencies.cmake
+++ b/cmake/FindDependencies.cmake
@@ -12,6 +12,7 @@ endif()
 find_package(Boost REQUIRED COMPONENTS
              graph
              program_options
+             OPTIONAL_COMPONENTS
              system)
 
 # Ceres