builder for '/nix/store/44gxjaq4lf71kp0sphnn4p57isragdx8-interactive-work-on-multi--combined-pkg-0-environment.drv' failed with exit code 1; last 2 log lines:
  unpacking sources
  variable $src or $srcs should point to the source
[1 built (1 failed), 0.0 MiB DL]
error: build of '/nix/store/44gxjaq4lf71kp0sphnn4p57isragdx8-interactive-work-on-multi--combined-pkg-0-environment.drv' failed