[Haskell-cafe] error when running stack

[Dennis Raddle]

I get this error when running stack:

Downloading lts- xxxx building plan
aesonException "Error in $['system-info']: key \"os\" not present"

running "stack update" didn't help.
I'm very confused because I don't remember what I did that provoked this
error.
Anyone know what's going on?
Dennis
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