Change:
<ins> { buildNpmPackage, fetchFromGitHub, lib, makeBinaryWrapper, nixosTests, nodejs, rdfind, }: let version = "2024.6.0"; # nix version of install-onlyoffice.sh # a later version could rebuild from sdkjs/web-apps as per # https://github.com/cryptpad/onlyoffice-builds/blob/main/build.sh onlyoffice_build = rev: hash: fetchFromGitHub { inherit rev hash; owner = "cryptpad"; repo = "onlyoffice-builds"; }; onlyoffice_install = oo: '' oo_dir="$out_cryptpad/www/common/onlyoffice/dist/${oo.subdir}" cp -a "${onlyoffice_build oo.rev oo.hash}/." "$oo_dir" chmod -R +w "$oo_dir" echo "${oo.rev}" > "$oo_dir/.commit" ''; onlyoffice_versions = [ { subdir = "v1"; rev = "4f370beb"; hash = "sha256-TE/99qOx4wT2s0op9wi+SHwqTPYq/H+a9Uus9Zj4iSY="; } { subdir = "v2b"; rev = "d9da72fd"; hash = "sha256-SiRDRc2vnLwCVnvtk+C8PKw7IeuSzHBaJmZHogRe3hQ="; } { subdir = "v4"; rev = "6ebc6938"; hash = "sha256-eto1+8Tk/s3kbUCpbUh8qCS8EOq700FYG1/KiHyynaA="; } { subdir = "v5"; rev = "88a356f0"; hash = "sha256-8j1rlAyHlKx6oAs2pIhjPKcGhJFj6ZzahOcgenyeOCc="; } { subdir = "v6"; rev = "abd8a309"; hash = "sha256-BZdExj2q/bqUD3k9uluOot2dlrWKA+vpad49EdgXKww="; } { subdir = "v7"; rev = "9d8b914a"; hash = "sha256-M+rPJ/Xo2olhqB5ViynGRaesMLLfG/1ltUoLnepMPnM="; } ]; in buildNpmPackage { inherit version; pname = "cryptpad"; src = fetchFromGitHub { owner = "cryptpad"; repo = "cryptpad"; rev = version; hash = "sha256-huIhhnjatkaVfm1zDeqi88EX/nAUBQ0onPNOwn7hrX4="; }; npmDepsHash = "sha256-Oh1fBvP7OXC+VDiH3D+prHmi8pRrxld06n30sqw5apY="; nativeBuildInputs = [ makeBinaryWrapper rdfind ]; patches = [ # fix httpSafePort setting # https://github.com/cryptpad/cryptpad/pull/1571 ./0001-env.js-fix-httpSafePort-handling.patch ]; # cryptpad build tries to write in cache dir makeCacheWritable = true; # 'npm build run' (scripts/build.js) generates a customize directory, but: # - that is not installed by npm install # - it embeds values from config into the directory, so needs to be # run before starting the server (it's just a few quick replaces) # Skip it here. dontNpmBuild = true; postInstall = '' out_cryptpad="$out/lib/node_modules/cryptpad" # 'npm run install:components' (scripts/copy-component.js) copies # required node modules to www/component in the build tree... # Move to install directory manually. npm run install:components mv www/components "$out_cryptpad/www/" # install OnlyOffice (install-onlyoffice.sh without network) mkdir -p "$out_cryptpad/www/common/onlyoffice/dist" ${lib.concatMapStringsSep "n" onlyoffice_install onlyoffice_versions} rdfind -makehardlinks true -makeresultsfile false "$out_cryptpad/www/common/onlyoffice/dist" # cryptpad assumes it runs in the source directory and also outputs # its state files there, which is not exactly great for us. # There are relative paths everywhere so just substituing source paths # is difficult and will likely break on a future update, instead we # make links to the required source directories before running. # The build.js step populates 'customize' from customize.dist and config; # one would normally want to re-run it after modifying config but since it # would overwrite user modifications only run it if there is no customize # directory. makeWrapper "${lib.getExe nodejs}" "$out/bin/cryptpad"  --add-flags "$out_cryptpad/server.js"  --run "for d in customize.dist lib www; do ln -sf "$out_cryptpad/$d" .; done"  --run "if ! [ -d customize ]; then "${lib.getExe nodejs}" "$out_cryptpad/scripts/build.js"; fi" ''; passthru.tests.cryptpad = nixosTests.cryptpad; meta = { description = "Collaborative office suite, end-to-end encrypted and open-source."; homepage = "https://cryptpad.org/"; license = lib.licenses.agpl3Plus; mainProgram = "cryptpad"; maintainers = with lib.maintainers; [ martinetd ]; }; } </ins>

Discussion:
Project description CryptPad is a collaborative office suite that is end-to-end encrypted and open-source. Enable this a service for NixOS. Metadata homepage URL: source URL: license: agpl2 platforms: unix, linux, darwin, ...
CryptPad used to be included in nixpkgs, but it was removed because there weren't enough maintainers. The removal occurred with the commits and .
Not quite true: it was removed because they had a strong dependency on out-of-date software. . Now, there is an ongoing effort to re-introduce it in : .