Failed Reason

==> Error: Conflicts in concretized spec "arbor@0.5%gcc@8.3.1~assertions~cuda~doc~ipo~mpi+neuroml+python~vectorize build_type=RelWithDebInfo cuda_arch=none arch=linux-rhel8-a64fx/bbd62se"
List of matching conflicts for spec:

arbor@0.5%gcc@8.3.1~assertions~cuda~doc~ipo~mpi+neuroml+python~vectorize build_type=RelWithDebInfo cuda_arch=none arch=linux-rhel8-a64fx
^cmake@3.19.5%gcc@8.3.1~doc+ncurses+openssl+ownlibs~qt build_type=Release arch=linux-rhel8-a64fx
^ncurses@6.2%gcc@8.3.1~symlinks+termlib arch=linux-rhel8-a64fx
^pkgconf@1.7.3%gcc@8.3.1 arch=linux-rhel8-a64fx
^openssl@1.1.1j%gcc@8.3.1+systemcerts arch=linux-rhel8-a64fx
^perl@5.32.1%gcc@8.3.1+cpanm+shared+threads arch=linux-rhel8-a64fx
^berkeley-db@18.1.40%gcc@8.3.1~docs patches=b231fcc4d5cff05e5c3a4814f6a5af0e9a966428dc2176540d2c05aff41de522 arch=linux-rhel8-a64fx
^gdbm@1.18.1%gcc@8.3.1 arch=linux-rhel8-a64fx
^readline@8.0%gcc@8.3.1 arch=linux-rhel8-a64fx
^zlib@1.2.11%gcc@8.3.1+optimize+pic+shared arch=linux-rhel8-a64fx
^libxml2@2.9.10%gcc@8.3.1~python arch=linux-rhel8-a64fx
^libiconv@1.16%gcc@8.3.1 arch=linux-rhel8-a64fx
^xz@5.2.5%gcc@8.3.1~pic arch=linux-rhel8-a64fx
^nlohmann-json@3.9.1%gcc@8.3.1~ipo+single_header build_type=RelWithDebInfo arch=linux-rhel8-a64fx
^py-numpy@1.20.1%gcc@8.3.1+blas+lapack patches=873745d7b547857fcfec9cae90b09c133b42a4f0c23b6c2d84cf37e2dd816604 arch=linux-rhel8-a64fx
^openblas@0.3.13%gcc@8.3.1~bignuma~consistent_fpcsr~ilp64+locking+pic+shared patches=865703b4f405543bbd583413fdeff2226dfda908be33639276c06e5aa7ae2cae threads=none arch=linux-rhel8-a64fx
^py-cython@0.29.21%gcc@8.3.1 arch=linux-rhel8-a64fx
^py-setuptools@50.3.2%gcc@8.3.1 arch=linux-rhel8-a64fx
^python@3.8.8%gcc@8.3.1+bz2+ctypes+dbm~debug+libxml2+lzma~nis~optimizations+pic+pyexpat+pythoncmd+readline+shared+sqlite3+ssl~tix~tkinter~ucs4+uuid+zlib patches=0d98e93189bc278fbc37a50ed7f183bd8aaf249a8e1670a465f0db6bb4f8cf87 arch=linux-rhel8-a64fx
^bzip2@1.0.8%gcc@8.3.1+shared arch=linux-rhel8-a64fx
^diffutils@3.7%gcc@8.3.1 arch=linux-rhel8-a64fx
^expat@2.2.10%gcc@8.3.1+libbsd arch=linux-rhel8-a64fx
^libbsd@0.10.0%gcc@8.3.1 arch=linux-rhel8-a64fx
^gettext@0.21%gcc@8.3.1+bzip2+curses+git~libunistring+libxml2+tar+xz arch=linux-rhel8-a64fx
^tar@1.32%gcc@8.3.1 arch=linux-rhel8-a64fx
^libffi@3.3%gcc@8.3.1 patches=26f26c6f29a7ce9bf370ad3ab2610f99365b4bdd7b82e7c31df41a3370d685c0 arch=linux-rhel8-a64fx
^sqlite@3.34.0%gcc@8.3.1+column_metadata+fts~functions~rtree arch=linux-rhel8-a64fx
^util-linux-uuid@2.36%gcc@8.3.1 arch=linux-rhel8-a64fx
^py-pybind11@2.5.0%gcc@8.3.1~ipo build_type=RelWithDebInfo arch=linux-rhel8-a64fx

1. "%gcc@:8.3" conflicts with "arbor"