Sencha Cmd v5.0.0.116 not able to generate app behind proxy

$ sencha generate app -ext Test ./Test

Sencha Cmd v5.0.0.116

[WRN] Failed to download remote catalog : Error downloading http://ift.tt/1kiO2OS

[ERR] Cannot satisfy requirements for "ext"!

[INF] The following versions are available:

[INF] The following versions can be satisfied:

[ERR] The following versions cannot be satisfied:

[ERR] framework package dependency: ext@5- (No matches!)

[ERR] Cannot resolve package requirements



This is Linux 64bit with the *_proxy env vars set.