exclude fetching exago for spack mirror [deception-rebuild]

Co-authored-by: Cameron Rutherford <[email protected]>

Author: jaelynlitz

buildsystem/spack/binary_mirror.sh

@@ -5,7 +5,7 @@ SPACK_MIRROR="${SPACK_MIRROR:?SPACK_MIRROR is unset. Please use the load_spack s
 spack -e $SPACKENV develop --path=$(pwd) exago@develop &&
 spack -e $SPACKENV bootstrap now &&
 spack -e $SPACKENV concretize -f &&
-(spack -e $SPACKENV mirror create -a --directory $SPACK_MIRROR || true) &&
+spack -e $SPACKENV mirror create -a --exclude-specs exago@develop --directory $SPACK_MIRROR &&
 spack -e $SPACKENV mirror add local file://$SPACK_MIRROR &&
 spack -e $SPACKENV mirror list