Run checks as non-privileged user

Dockerfile

@@ -95,18 +95,24 @@ FROM base-${MPI_FLAVOR} AS final
 ARG MUST_VERSION=1.9.2
 # Build and install MUST
 RUN mkdir -p /opt/must/
+WORKDIR /build
 RUN wget https://hpc.rwth-aachen.de/must/files/MUST-v${MUST_VERSION}.tar.gz && \
-    tar -xf MUST-v${MUST_VERSION}.tar.gz && cd MUST-v${MUST_VERSION} && \
-    mkdir build && \
-    cd build && \
+    tar -xf MUST-v${MUST_VERSION}.tar.gz && mkdir -p MUST-v${MUST_VERSION}/build
+
+RUN cd MUST-v${MUST_VERSION}/build && \
     CC=clang CXX=clang++ MPICH_CC=clang MPICH_CXX=clang++ OMPI_CC=clang OMPI_CXX=clang \
       cmake .. -DCMAKE_INSTALL_PREFIX=/opt/must -DUSE_BACKWARD=ON -DENABLE_TESTS=ON -DENABLE_FORTRAN=ON -DLLVM_FILECHECK_PATH=$(which FileCheck) -DCMAKE_BUILD_TYPE=Release && \
-    make install -j8 install-prebuilds && \
-    make check-basic -j8 && \
-    rm /MUST-v${MUST_VERSION}.tar.gz && \
-    rm -r -f /MUST-v${MUST_VERSION}
+    make install -j8 install-prebuilds
 
-# Run as non-privileged user
+# Run checks as non-privileged user (required for OpenMPI)
 RUN useradd -ms /bin/bash user
+RUN chown -R user /build
 USER user
+
+RUN cd MUST-v${MUST_VERSION}/build && \
+    make check-minimal -j8
+
+RUN rm -r /build
+
+# Run container as non-privileged user
 WORKDIR /home/user
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