Still to many compilers installed

ci/install_compilers.sh

@@ -11,7 +11,15 @@ ${STACK_LOCATION}/spack/bin/spack compiler find --scope system /usr
 
 for c in  "core_compilers" "compilers"; do
     echo "Installing $c"
-    _specs=$(comp=$c jq -Mr '.stack | .system_arch as $arch | with_entries(select(.key==env.comp)) | to_entries | .[].value | map("\(.spec) \($arch)")[]' ${STACK_CONFIG})
+    _specs=$(comp=$c jq -Mr '
+      .stack
+        | .system_arch as $arch
+        | with_entries(select(.key==env.comp))
+        | to_entries
+        | .[].value
+        | map(select(.constraint == null))
+        | map("\(.spec) \($arch)")[]
+     ' ${STACK_CONFIG})
 
     echo "Compilers to install:"
     echo "${_specs}"
@@ -69,6 +77,7 @@ compilers_specs=$(jq -Mr '
 .stack
  | .system_arch as $arch
  | .core_compilers + .compilers
+ | map(select(.constraint == null))
  | map("\(.spec) \($arch)")
 ' ${STACK_CONFIG})