==> Making package: glibc 2.22-3 (Thu Dec  3 20:09:02 CET 2015)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Downloading glibc-2.22.tar.xz...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0 12.3M    0 96224    0     0   118k      0  0:01:46 --:--:--  0:01:46  118k
 21 12.3M   21 2660k    0     0  1532k      0  0:00:08  0:00:01  0:00:07 1532k
 52 12.3M   52 6687k    0     0  2454k      0  0:00:05  0:00:02  0:00:03 2454k
 82 12.3M   82 10.1M    0     0  2802k      0  0:00:04  0:00:03  0:00:01 2801k
100 12.3M  100 12.3M    0     0  2949k      0  0:00:04  0:00:04 --:--:-- 2950k
  -> Downloading glibc-2.22.tar.xz.sig...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100   473  100   473    0     0   1501      0 --:--:-- --:--:-- --:--:--  1506
  -> Found glibc-2.22-roundup.patch
  -> Found locale.gen.txt
  -> Found locale-gen
==> Validating source files with md5sums...
    glibc-2.22.tar.xz ... Passed
    glibc-2.22.tar.xz.sig ... Skipped
    glibc-2.22-roundup.patch ... Passed
    locale.gen.txt ... Passed
    locale-gen ... Passed
==> Verifying source file signatures with gpg...
    glibc-2.22.tar.xz ... FAILED (unknown public key 25EF0A436C2A4AFF)
==> ERROR: One or more PGP signatures could not be verified!