I tried running the bat file and I got 2 errors on build:

Environment variable 'ARMCC5BIN' is not set indicating ARMCC 5 is not properly installed. at ArmccCompilerSettings..ctor () [0x0003f] in C:\buildslave\unity\build\PlatformDependent\N3DS\Editor\Managed\ArmccCompilerSettings.cs:16 at UnityEditor.N3DS.Il2CppPlatformProvider.CreateNativeCompiler () [0x00001] in C:\buildslave\unity\build\PlatformDependent\N3DS\Editor\Managed\Il2CppPlatformProvider.cs:85 at UnityEditorInternal.IL2CPPBuilder.Run () [0x0009e] in C:\buildslave\unity\build\Editor\Mono\BuildPipeline\Il2Cpp\IL2CPPUtils.cs:153 at UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String stagingAreaData, IIl2CppPlatformProvider platformProvider, System.Action`1 modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry, Boolean debugBuild) [0x0000f] in C:\buildslave\unity\build\Editor\Mono\BuildPipeline\Il2Cpp\IL2CPPUtils.cs:41 at UnityEditor.PostProcessN3DS.PostProcess (BuildTarget target, BuildOptions options, System.String installPath, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String stagingAreaDataManaged, UnityEditor.RuntimeClassRegistry usedClassRegistry) [0x00146] in C:\buildslave\unity\build\PlatformDependent\N3DS\Editor\Managed\PostProcessN3DS.cs:200 UnityEditor.HostView:OnGUI()

Error building Player: Environment variable 'ARMCC5BIN' is not set indicating ARMCC 5 is not properly installed. at ArmccCompilerSettings..ctor () [0x0003f] in C:\buildslave\unity\build\PlatformDependent\N3DS\Editor\Managed\ArmccCompilerSettings.cs:16 at UnityEditor.N3DS.Il2CppPlatformProvider.CreateNativeCompiler () [0x00001] in C:\buildslave\unity\build\PlatformDependent\N3DS\Editor\Managed\Il2CppPlatformProvider.cs:85 at UnityEditorInternal.IL2CPPBuilder.Run () [0x0009e] in C:\buildslave\unity\build\Editor\Mono\BuildPipeline\Il2Cpp\IL2CPPUtils.cs:153 at UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String stagingAreaData, IIl2CppPlatformProvider platformProvider, System.Action`1 modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry, Boolean debugBuild) [0x0000f] in C:\buildslave\unity\build\Editor\Mono\BuildPipeline\Il2Cpp\IL2CPPUtils.cs:41 at UnityEditor.PostProcessN3DS.PostProcess (BuildTarget target, BuildOptions options, System.String installPath, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String stagingAreaDataManaged, UnityEditor.RuntimeClassRegistry usedClassRegistry) [0x00146] in C:\buildslave\unity\build\PlatformDependent\N3DS\Editor\Managed\PostProcessN3DS.cs:200