these 2 derivations will be built:
  /nix/store/m750q8bliv92alkaj1jfxkc72ivbmfl5-orca-ide_1.4.205_amd64.deb.drv
  /nix/store/xk1y6g68kykghzginkbqplj5h5gs75pf-orca-1.4.205.drv