Can't build 5.5.1 from source on Linux Mint (Ubuntu based)

Hi Garrd,

So apparently according to UEBuildLinux.cs line 276 I saw this.

Target.bCompileISPC = true;

And according to its attribute in TargetRules.cs

		/// <summary>
		/// Whether to compile using ISPC.
		/// </summary>
		[RequiresUniqueBuildEnvironment]
		public bool bCompileISPC { get; set; }

My guess is that UBT is broken on that one because if you go to EngineRoot/Engine/Source and you put in UnrealEditor.Target.cs :

bCompileISPC = false;

It builds successfully

But thats odd because I didn’t change the build environment and normally UBT should ignore this and just use the forced value.

Thanks for your link o/

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