these 3 derivations will be built:
  /nix/store/13rscnjjgl4jqrafmq1xmr7m108lfb8m-ctx-2.1.4-vendor.drv
  /nix/store/217l4zq56y4nrfgbafra5g1nldx4f3p0-ctx-2.1.4.drv
  /nix/store/8kx8agwlbs768b966i90gpxy6830j61j-check-ctx.drv