Error: undeclared identifier: 'readLine' nim

Error: undeclared identifier: 'readLine' candidates (edit distance, scope distance); see '--spellSuggest': (0, 4): 'readLine' [proc declared in /usr/lib/nim/lib/system/io.nim(376, 6)] (0, 4): 'readLine' [proc declared in /usr/lib/nim/lib/system/io.nim(498, 6)]

let link = os.readLine("link»")