# Packages matching: installed # Name # Installed # Synopsis base-bigarray base base-threads base base-unix base camlp5 7.14 Preprocessor-pretty-printer of OCaml conf-findutils 1 Virtual package relying on findutils conf-perl 2 Virtual package relying on perl coq 8.8.2 Formal proof management system num 1.4 The legacy Num library for arbitrary-precision integer and rational arithmetic ocaml 4.07.1 The OCaml compiler (virtual package) ocaml-base-compiler 4.07.1 Official release 4.07.1 ocaml-config 1 OCaml Switch Configuration ocamlfind 1.9.5 A library manager for OCaml # opam file: opam-version: "2.0" maintainer: "palmskog@gmail.com" homepage: "https://github.com/coq-community/huffman" dev-repo: "git+https://github.com/coq-community/huffman.git" bug-reports: "https://github.com/coq-community/huffman/issues" doc: "https://coq-community.org/huffman/" license: "LGPL-2.1-or-later" synopsis: "Coq proof of the correctness of the Huffman coding algorithm" description: """ This projects contains a Coq proof of the correctness of the Huffman coding algorithm, as described in David A. Huffman's paper A Method for the Construction of Minimum-Redundancy Codes, Proc. IRE, pp. 1098-1101, September 1952.""" build: [make "-j%{jobs}%"] install: [make "install"] depends: [ "coq" {>= "8.12" & < "8.17~"} ] tags: [ "category:Computer Science/Decision Procedures and Certified Algorithms/Correctness proofs of algorithms" "category:Miscellaneous/Extracted Programs/Combinatorics" "keyword:data compression" "keyword:code" "keyword:huffman tree" "logpath:Huffman" "date:2022-06-19" ] authors: [ "Laurent Théry" ] url { src: "https://github.com/coq-community/huffman/archive/v8.15.0.tar.gz" checksum: "sha512=06b6147a713e3f15428623ab09c9f226e626837a9e1876892a24ebdc1843c84ade0ccd8aafe53892b899dc235ff42d0e3cc11e4bd324f3ebb57e205e4fdf6a9d" }
true
Dry install with the current Coq version:
opam install -y --show-action coq-huffman.8.15.0 coq.8.8.2
[NOTE] Package coq is already installed (current version is 8.8.2). The following dependencies couldn't be met: - coq-huffman -> coq >= 8.12 -> ocaml >= 4.09.0 base of this switch (use `--unlock-base' to force) Your request can't be satisfied: - No available version of coq satisfies the constraints No solution found, exiting
Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:
opam remove -y coq; opam install -y --show-action --unlock-base coq-huffman.8.15.0
true
true
No files were installed.
true