Add expression for Coq 8.3 beta
tree8cfcb2384819c7f8dea7573c56e33f9bf09a8853
-rw-r--r-- 1650 COPYING
-rw-r--r-- 1 STABLE
-rw-r--r-- 4 VERSION
-rw-r--r-- 41 default.nix
drwxr-xr-x - doc
drwxr-xr-x - maintainers
drwxr-xr-x - pkgs