FAQ

How can I define extra runtime dependencies?

If you try to call an external program from your Clojure application, you will get an error (something like Cannot run program "some-program": error=2, No such file or directory). One possible solution is to wrap the binary:

cljpkgs.mkCljBin {
# ...
nativeBuildInputs = [ pkgs.makeWrapper ];
postInstall = ''
  wrapProgram $binaryPath \
    --set PATH ${pkgs.lib.makeBinPath [ pkgs.cowsay ]}
'';
}

Notice that the $binaryPath is a proper Bash variable. It is created by mkCljBin during the install phase.

or if you want to define the dependencies in a docker image:

pkgs.dockerTools.buildLayeredImage {
  # ...
  config = {
    Env = [ "PATH=${pkgs.lib.makeBinPath [ pkgs.cowsay ]}" ];
  };
}

My customJdk application has an SSL handshake_failure

If after creating an application using the customJdk function, you might see an error like the following:

javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure

This could be caused by a missing JDK module, such as jdk.crypto.ec, which is required for many https connections. Add the missing modules explicitly:

custom-jdk = pkgs.customJdk {
  cljDrv = clj;
  jdkBase = pkgs.jdk17_headless;
  locales = "en";
  java-opts = [ ];
  extraJdkModules = [ "java.security.jgss" "java.security.sasl" "jdk.crypto.ec" ];
};