Restore libnabo install directory for linux builds in github actions

Author: boxanm

.github/workflows/build-python.yaml

@@ -204,6 +204,7 @@ jobs:
           cd libnabo
           cmake -GNinja \
             -DBOOST_ROOT=${{ env.BOOST_INSTALL_PATH }} \
+            -DCMAKE_INSTALL_PREFIX=${{ env.LIBNABO_INSTALL_PATH }} \
             -DCMAKE_BUILD_TYPE=RelWithDebInfo \
             -DUSE_OPEN_MP:BOOL=ON \
             -S . -B ./build
@@ -216,6 +217,7 @@ jobs:
         run: |
           cmake \
             -DBOOST_ROOT:PATH=${{ env.BOOST_INSTALL_PATH }} \
+            -DLIBNABO_INSTALL_DIR=${{ env.LIBNABO_INSTALL_PATH }} \
             -DBUILD_PYTHON_MODULE:BOOL=ON \
             -DUSE_OPEN_MP:BOOL=ON \
             -DBoost_USE_STATIC_LIBS:BOOL=ON \