nix.md

Compilation of Elmer under Nix

Compiling from upstream

The Nix flake exposes derivations (packages) that can be built using nix build github:ElmerCSC/elmerfem#<version>.

List of included derivations

default

Barebones Elmer with OpenMP and MPI support.

gui

Elmer with GUI.

full

A derivation with more parallel computing features such as HYPRE.

All derivations have Elmer/Ice.

Specifying no version builds the default derivation.

After building, the binaries are accessible under result/bin.

Compiling from a local repository

In the local Elmer repository run nix build or nix build .#<version>.

Verbose output

By default nix build only shows one line of the build output at once. To enable more verbose output, add the -L flag to the end of the build command.