build coin in subdir

Dockerfile

@@ -21,8 +21,8 @@ RUN apt-get update -qq && \
     mercurial \
     nlohmann-json3-dev \
     libexpat1-dev \
-    libssl-dev  \
-    apt-utils && \
+    apt-utils \
+    libssl-dev && \
     apt-get clean all
 
 ### Install tzdata package
@@ -69,17 +69,19 @@ RUN wget -O xerces-c.tar.gz https://github.com/apache/xerces-c/archive/refs/tags
 RUN apt-get update && apt-get install -y mesa-utils build-essential libgl1-mesa-dev
 
 ### Install Coin
-RUN pwd && \
-    ls  && \
+RUN mkdir -p build_coin && \
+    cd build_coin \
     wget https://github.com/coin3d/coin/releases/download/Coin-${Coin_VERSION}/coin-${Coin_VERSION}-src.tar.gz && \
     tar -xzf coin-${Coin_VERSION}-src.tar.gz && \
     ls -lh && \
     mv coin-sources/* coin && \
-    mkdir build_coin && \
+    mkdir build && \
     cd build_coin && \
     cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=$INSTALL_DIR ../coin && \
     make -j4 && \
-    make install
+    make install && \
+    cd ../.. && \
+    rm -rf build_coin
 
 ### Install soqt
 RUN pwd; ls && \