Treat hashes separately

.gitlab-ci.yml

@@ -153,14 +153,13 @@ spack:install_compilers:
       cat compiler_definitions.yaml
 
     - |
-      while read -r compiler_hash
-      do
+      for compiler_hash in $(echo ${hashes})
         echo "spack/bin/spack location -i ${compiler_hash}"
         location=$(spack/bin/spack location -i ${compiler_hash})
 
         echo "spack/bin/spack compiler find --scope system ${location}"
         spack/bin/spack compiler find --scope system $(spack/bin/spack location -i ${compiler_hash})
-      done <<< $(echo ${hashes})
+      done
 
     - spack/bin/spack -e . config blame compilers