Sergei Trofimovich 0b2d3bbfcb yices: 2.6.3 -> 2.6.2 ... 2.6.3 is not a stable tag (and is really a 2.6.4 in disguise). Failure is noticed by vbgl in https://github.com/NixOS/nixpkgs/pull/141241#issuecomment-942103854 The change downgrades from unstable to latest stable release and adds a check for file presence to prevent upgrade that silently breaks symlink.		2021-10-13 17:58:26 +01:00
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default.nix