Index - F
| FailCheck | Niv.Update |
| FailNoSuchKey | Niv.Update |
| FailTemplate | Niv.Update |
| FailZero | Niv.Update |
| faint | Niv.Logger |
| FetchNixpkgs | Niv.Cli |
| FindSourcesJson | Niv.Sources |
| First | Niv.Update |
| forWithKeyM | Data.HashMap.Strict.Extended |
| forWithKeyM_ | Data.HashMap.Strict.Extended |
| Free | Niv.Update |
| Freedom | Niv.Update |