Invalid license GPL-3.0-or-later

It seems to me that GPL-3.0-or-later is a valid SPX License identifier; see

When I run conda build on for my project I get the message:

 C1115 Found invalid license "GPL-3.0-or-later" in info/index.jso

How should I proceed for a project that is using the GPL-3.0 or later license ?

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It seems that conda build is in a state of limbo with respect to specifying licenses. It is suggested that you use the SPDX identifiers; see
Yet SPDX identifies are not yet support it; see

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