zao: can you do this with easybuild?
```
clang      = ['10.0.0', '9.0.1', '8.0.0', '7.1.0', '7.0.1', '6.0.1']
gcc        = ['9.3.0', '9.2.0', '9.1.0', '8.4.0', '8.3.0', '8.2.0', '8.1.0', '7.4.0', '7.3.0', '7.2.0', '7.1.0']
boost      = ['1.72.0', '1.71.0', '1.70.0', '1.69.0', '1.68.0', '1.67.0']
hwloc      = ['2.1.0', '2.0.2']
jemalloc   = ['5.2.1']
gperftools = ['2.7']
otf2       = ['2.2']
['spack', 'install', 'llvm@10.0.0']
['spack', 'install', 'llvm@9.0.1']
['spack', 'install', 'llvm@8.0.0']
['spack', 'install', 'llvm@7.1.0']
['spack', 'install', 'llvm@7.0.1']
['spack', 'install', 'llvm@6.0.1']
['spack', 'install', 'gcc@9.3.0']
['spack', 'install', 'gcc@9.2.0']
['spack', 'install', 'gcc@9.1.0']
['spack', 'install', 'gcc@8.4.0']
['spack', 'install', 'gcc@8.3.0']
['spack', 'install', 'gcc@8.2.0']
['spack', 'install', 'gcc@8.1.0']
['spack', 'install', 'gcc@7.4.0']
['spack', 'install', 'gcc@7.3.0']
['spack', 'install', 'gcc@7.2.0']
['spack', 'install', 'gcc@7.1.0']
['spack', 'install', 'boost@1.72.0', '%clang@10.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%clang@9.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%clang@8.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%clang@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%clang@7.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%clang@6.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@9.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@9.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@9.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@8.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@8.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@8.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@8.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@7.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@7.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@7.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.72.0', '%gcc@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%clang@10.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%clang@9.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%clang@8.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%clang@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%clang@7.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%clang@6.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@9.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@9.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@9.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@8.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@8.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@8.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@8.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@7.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@7.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@7.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.71.0', '%gcc@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%clang@10.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%clang@9.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%clang@8.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%clang@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%clang@7.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%clang@6.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@9.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@9.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@9.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@8.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@8.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@8.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@8.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@7.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@7.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@7.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.70.0', '%gcc@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%clang@10.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%clang@9.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%clang@8.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%clang@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%clang@7.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%clang@6.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@9.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@9.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@9.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@8.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@8.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@8.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@8.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@7.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@7.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@7.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.69.0', '%gcc@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%clang@10.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%clang@9.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%clang@8.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%clang@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%clang@7.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%clang@6.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@9.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@9.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@9.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@8.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@8.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@8.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@8.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@7.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@7.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@7.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.68.0', '%gcc@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%clang@10.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%clang@9.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%clang@8.0.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%clang@7.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%clang@7.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%clang@6.0.1', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@9.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@9.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@9.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@8.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@8.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@8.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@8.1.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@7.4.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@7.3.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@7.2.0', 'cxxstd=14']
['spack', 'install', 'boost@1.67.0', '%gcc@7.1.0', 'cxxstd=14']
['spack', 'install', 'hwloc@2.1.0', '%gcc@9.3.0']
['spack', 'install', 'hwloc@2.0.2', '%gcc@9.3.0']
['spack', 'install', 'jemalloc@5.2.1', '%gcc@9.3.0']
['spack', 'install', 'gperf@2.7', '%gcc@9.3.0']
['spack', 'install', 'otf2@2.2', '%gcc@9.3.0']

```