Only enforce RestoreLockedMode on Windows

Author: jnyrup

Build/Build.cs

@@ -113,7 +113,6 @@ class Build : NukeBuild
             DotNetRestore(s => s
                 .SetProjectFile(Solution)
                 .EnableNoCache()
-                .EnableLockedMode()
                 .SetConfigFile(RootDirectory / "nuget.config"));
         });
 

Directory.Build.props

@@ -4,7 +4,7 @@
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
-    <RestoreLockedMode Condition="'$(ContinuousIntegrationBuild)' == 'true'">true</RestoreLockedMode>
+    <RestoreLockedMode Condition="'$(ContinuousIntegrationBuild)' == 'true' AND $([System.OperatingSystem]::IsWindows())">true</RestoreLockedMode>
   </PropertyGroup>
 
   <!-- To reduce build times, we only enable analyzers for the newest TFM -->