haskellPackages.lifted-stm 0.2 -> 0.2.0.1 https://repology.org/project/haskell:lifted-stm/versions
attrpath: haskellPackages.lifted-stm
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- Frozen haskellPackages set for 21.05 to ease backporting bug fix releases
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/138407"