NimblePathResult = object
  pkgs*: NimbleDirAdd
  addedPaths*: seq[AbsoluteDir]

NimblePkgAddResult = enum
  nimblePkgInvalid, nimblePkgAdded, nimblePkgUpdated, nimblePkgOlder

Version = distinct string

proc `$`(ver: Version): string {.borrow, ...raises: [], tags: [].}

proc `<`(ver: Version; ver2: Version): bool {....raises: [ValueError], tags: [].}

proc addPath(conf: ConfigRef; path: AbsoluteDir) {....raises: [], tags: [].}

proc getPathVersionChecksum(p: string): tuple[name, version, checksum: string] {.
    ...raises: [], tags: [].}

proc newVersion(ver: string): Version {....raises: [], tags: [].}

proc nimblePath(conf: ConfigRef; path: AbsoluteDir): NimblePathResult {.
    ...raises: [OSError, ValueError, IOError], tags: [ReadDirEffect, ReadIOEffect].}