'sourceMap' seems to replace ‘source’

[T-Inphic]

{
loader: require.resolve("less-loader"),
options: Object.assign(loaderOptions, {
source: shouldUseSourceMap
})
}

[Anish-Agnihotri]

Hi @T-Inphic,

This issue has been resolved in the latest customize-cra at version 1.0. It is a breaking change, and you can follow the migration guide in #253 to fix the issue you were running into (you have to nest your configuration in the lessOptions object.