Cannot build projects with latest mono 2018-04

[garuma]

Either a normal build or invoking msbuild /restore will error-out with the following:

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(654,2): error MSB3644: The reference assemblies for framework "MonoAndroid,Version=v1.0" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.

This issue is reproducible with build from mono/mono@07c8f25 but not with earlier build mono/mono@33a9dca which could suggest mono/mono@543b687 is the culprit

[kdubau]

@radical any updates here? This is blocking a lot of testing.

[GouriKumari]

nuget restore of a solution is failing with the same error and this blocks the building of iOS projects in solution.

nuget restore "/Users/xamarinqa/agent/_work/r26/a/xamarin-forms-book-samples/Chapter14/AbsoluteDemo/AbsoluteDemo.sln"
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(654,2): error MSB3644: The reference assemblies for framework "MonoAndroid,Version=v1.0" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend. [/Users/xamarinqa/agent/_work/r26/a/xamarin-forms-book-samples/Chapter14/AbsoluteDemo/AbsoluteDemo/AbsoluteDemo.Droid/AbsoluteDemo.Droid.csproj]