Fix expansion to preserve sources' internal folders

Dockerfile

@@ -83,25 +83,27 @@ RUN apt-get update && apt-get install -y mesa-utils build-essential libgl1-mesa-
 RUN mkdir -p build_coin && \
     cd build_coin && \
     wget https://geomodel.web.cern.ch/sources/coin-${Coin_VERSION}-src.zip && \
-    unzip -j coin-${Coin_VERSION}-src.zip -d coin && \
+    unzip -j coin-${Coin_VERSION}-src.zip -d coin-sources && \
+    mv coin-sources/* coin \
     mkdir build && \
     cd build && \
     cmake -DCMAKE_BUILD_TYPE=Debug \
-          -DCOIN_BUILD_TESTS=0 \
-          -DCMAKE_CXX_STANDARD=17 \
-          -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} \
-          ../coin && \
+    -DCOIN_BUILD_TESTS=0 \
+    -DCMAKE_CXX_STANDARD=17 \
+    -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} \
+    ../coin && \
     make -j4 && \
     make install && \
     cd ../.. && \
     rm -rf build_coin
-
-### Install soqt
-RUN pwd; ls && \
-     mkdir -p build_soqt && \
-     cd build_soqt  && \
-     wget https://geomodel.web.cern.ch/sources/coin-${SOQT_VERSION}-src.zip && \
-     unzip -j soqt-${SOQT_VERSION}-src.zip -d soqt && \
+    
+    ### Install soqt
+    RUN pwd; ls && \
+    mkdir -p build_soqt && \
+    cd build_soqt  && \
+    wget https://geomodel.web.cern.ch/sources/coin-${SOQT_VERSION}-src.zip && \
+    unzip -j soqt-${SOQT_VERSION}-src.zip -d soqt-sources && \
+    mv soqt-sources/* coin \
      mkdir build && \
      cd build && \
      cmake -DCMAKE_BUILD_TYPE=Debug \