Add wget to building deps

[docker-library]

Add wget to building deps

[tianon]

I can't seem to reproduce the issue. 😞

[alekc]

That's weird...
So, it fails on debian jessie

# docker version
Client:
 Version:           18.06.1-ce
 API version:       1.38
 Go version:        go1.10.3
 Git commit:        e68fc7a
 Built:             Tue Aug 21 17:25:03 2018
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.06.1-ce
  API version:      1.38 (minimum version 1.12)
  Go version:       go1.10.3
  Git commit:       e68fc7a
  Built:            Tue Aug 21 17:23:29 2018
  OS/Arch:          linux/amd64
  Experimental:     false

but it compiles on debian stretch

# docker version
Client:
 Version:           18.09.6
 API version:       1.39
 Go version:        go1.10.8
 Git commit:        481bc77
 Built:             Sat May  4 02:36:00 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          18.09.6
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.10.8
  Git commit:       481bc77
  Built:            Sat May  4 01:59:36 2019
  OS/Arch:          linux/amd64
  Experimental:     false

(shouldn't docker be consistent? sigh)
Anyway, I've tried it on another jessie box as well (3.16.0-4-amd64) and it fails there as well.
However, when I launched a brand new jessie instance and installed docker there, it worked without issue, even when I lowered it's version to 18.06.1-ce

I do not know what's causing the issue on other 2 boxes (they are in different environments), but I do not think adding explicit wget reference to the list of build dependencies would be too big of an issue (since it would be removed in a later building phase).

[wglambert]

Going to close since this isn't reproducible and the issue seems to be with the build environment

For further help troubleshooting you could try asking over at the Docker Community Forums, Docker Community Slack, or Stack Overflow