Fix PY_PATH environment variable

Author: alecbcs

clingo/Dockerfile.manylinux2014

@@ -23,8 +23,7 @@ RUN spack config add "config:install_tree:padded_length:256"
 COPY clingo/install_clingo.py /root/install_clingo.py
 
 RUN export PY_PATH=$(printf '%s' "$PYTHON_VERSION" | \
-    awk -F. '{maj=$1; min=$2; suf=(maj*10+min<=37)?"m":""; printf "cp%d%d-cp%d%d%s\n", maj, min, maj, min, suf}')
-
-RUN SPACK_PYTHON=/opt/python/$PY_PATH/bin/python3 spack python install_clingo.py
+    awk -F. '{maj=$1; min=$2; suf=(maj*10+min<=37)?"m":""; printf "cp%d%d-cp%d%d%s\n", maj, min, maj, min, suf}') \
+    && SPACK_PYTHON=/opt/python/${PY_PATH}/bin/python3 spack python install_clingo.py
 
 RUN spack buildcache push --unsigned ./binary-mirror $(spack --color=never find --hashes clingo-bootstrap)