Nuget unable to find version of package

Ruing this command

nuget.exe restore .MySolution.sln

gives this error:

Unable to find version '1.0.0' of package 'Microsoft.Net.Compilers'.

where the package has previously been installed and restored, but has somehow become corrupt.

Tus out simply updating the Nuget version via

nuget.exe update -self

to update from 2.8.0 to 3.4.4 was sufficient, and the package now restores correctly.