translate nix-env calls given at lazamar.co.uk to nix profile calls

readme.md

• See https://nix.dev/manual/nix/2.19/command-ref/new-cli/nix3-profile-install#examples and
• https://www.reddit.com/r/NixOS/comments/15ke4tk/comment/jv4w235/ and i. e.
• https://lazamar.co.uk/nix-versions/?channel=nixpkgs-unstable&package=hledger-iadd

Given at lazamar is:

nix-env -iA haskellPackages.hledger-iadd_1_3_16 -f https://github.com/NixOS/nixpkgs/archive/d1c3fea7ecbed758168787fe4e4a3157e52bc808.tar.gz

which translates to (I have flake-registry set, see example):

nix profile install nixpkgs/d1c3fea7ecbed758168787fe4e4a3157e52bc808#haskellPackages.hledger-iadd
# theoretically this also should work:
# nix profile install nixpkgs/d1c3fea7ecbed758168787fe4e4a3157e52bc808#haskellPackages.hledger-iadd_1_3_16