Change:
<ins> { lib, stdenv, fetchFromGitHub , autoPatchelfHook , fuse, packer , maven, jdk, jre, makeWrapper, glib, wrapGAppsHook }: let pname = "cryptomator"; version = "1.5.13"; src = fetchFromGitHub { owner = "cryptomator"; repo = "cryptomator"; rev = version; sha256 = "1s9jl3nl6yfjzmilz9b8azk8592nd39xflzfdf38v6s4iiq86r8j"; }; icons = fetchFromGitHub { owner = "cryptomator"; repo = "cryptomator-linux"; rev = version; sha256 = "1x6h6wp6yxnj576874xj3d2jm8jmb7918wprqvlz4sryxhlcssa7"; }; # perform fake build to make a fixed-output derivation out of the files downloaded from maven central (120MB) deps = stdenv.mkDerivation { name = "cryptomator-${version}-deps"; inherit src; nativeBuildInputs = [ jdk maven ]; buildPhase = '' cd main while mvn -Prelease package -Dmaven.repo.local=$out/.m2 -Dmaven.wagon.rto=5000; [ $? = 1 ]; do echo "timeout, restart maven to continue downloading" done ''; # keep only *.{pom,jar,sha1,nbm} and delete all ephemeral files with lastModified timestamps inside installPhase = '' find $out/.m2 -type f -regex '.+(.lastUpdated|resolver-status.properties|_remote.repositories)' -delete find $out/.m2 -type f -iname '*.pom' -exec sed -i -e 's/r+$//' {} ; ''; outputHashAlgo = "sha256"; outputHashMode = "recursive"; outputHash = "06q8bqdz3c4i84wxl9z5861zwdsw8jzcvsbgxqrnh8rwi7500sa7"; }; in stdenv.mkDerivation rec { inherit pname version src; buildPhase = '' cd main mvn -Prelease package --offline -Dmaven.repo.local=$(cp -dpR ${deps}/.m2 ./ && chmod +w -R .m2 && pwd)/.m2 ''; installPhase = '' mkdir -p $out/bin/ $out/usr/share/cryptomator/libs/ cp buildkit/target/libs/* buildkit/target/linux-libs/* $out/usr/share/cryptomator/libs/ makeWrapper ${jre}/bin/java $out/bin/cryptomator  --add-flags "-classpath '$out/usr/share/cryptomator/libs/*'"  --add-flags "-Dcryptomator.settingsPath='~/.config/Cryptomator/settings.json'"  --add-flags "-Dcryptomator.ipcPortPath='~/.config/Cryptomator/ipcPort.bin'"  --add-flags "-Dcryptomator.logDir='~/.local/share/Cryptomator/logs'"  --add-flags "-Dcryptomator.mountPointsDir='~/.local/share/Cryptomator/mnt'"  --add-flags "-Djdk.gtk.version=3"  --add-flags "-Xss20m"  --add-flags "-Xmx512m"  --add-flags "org.cryptomator.launcher.Cryptomator"  --prefix PATH : "$out/usr/share/cryptomator/libs/:${lib.makeBinPath [ jre glib ]}"  --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ fuse ]}"  --set JAVA_HOME "${jre.home}" # install desktop entry and icons cp -r ${icons}/resources/appimage/AppDir/usr $out/ ''; nativeBuildInputs = [ autoPatchelfHook maven makeWrapper wrapGAppsHook jdk ]; buildInputs = [ fuse packer jre glib ]; meta = with lib; { description = "Free client-side encryption for your cloud files"; homepage = "https://cryptomator.org"; license = licenses.gpl3Plus; maintainers = with maintainers; [ bachp ]; platforms = platforms.linux; }; } </ins>

Discussion:
Project description Cryptomator is an application providing client-side encryption for cloud storage. Metadata homepage URL: source URL: license: GPLv3 platforms: linux, darwin
Source URL:
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This is still relevant to me. There is currently no way to get transparent encryption on any cloud-drive.
guys, whoever is interested in cryptomator testing/reviewing are welcome: we absolutely need it for darwin platform as well?
Let's first get it merged for linux, we can then base on that and check if we can get darwin working too.