The SINGULARITY_ROOT property is not set. Make sure you have run setenv.cmd. To build from within VS, please run 'setenv /vs'. This creates the Ide.targets file, which the build system needs when building within VS. $(SystemRoot)\System32;$(SystemRoot);$(SINGULARITY_ROOT)\build;$(SINGULARITY_ROOT) false true false $(SINGULARITY_ROOT) $(BASEDIR)\Build $(BASEDIR)\Options $(BASEDIR)\Windows\Bin $(BASEDIR)\Windows\Midori MpSyscallBuilder $(DEFAULT_ASMP_SYSCALL_BUILDER) $(AFLAGS) /nologo /Zi /Cp /DSINGULARITY=1 $(CFLAGS) /nologo /W3 /WX /Gy /Zi /O2 /Oy- /GS- /DSINGULARITY=1 $(CFLAGS) Concurrent MarkSweep $(DEFAULT_COLLECTOR_KERNEL) $(DEFAULT_COLLECTOR_APP) COLLECTOR_KERNEL must either be unset, or set to one of "AdaptiveCopying" or "Concurrent" or "MarkSweep" or "Semispace" or "Sliding" COLLECTOR_APP must either be unset, or set to one of "AdaptiveCopying" or "Concurrent" or "MarkSweep" or "Semispace" or "Sliding" ApicPC Debug 1 x86 false 4 x86 true 1 x86 false Platform must either be unset, or set to one of "LegacyPC" or "ApicPC" or "ApicMP". '$(Platform)' is invalid. $(BUILDDIR)\cl.exe $(BUILDDIR)\ml.exe $(BUILDDIR)\bartok.exe $(BUILDDIR) LITTLE_ENDIAN Singularity.V1.def $(BARTOK_FLAGS) /IrPeepholeNull=false Min $(DEFAULT_SCHEDULER) $(CSFLAGS) /D:AFFINITY_SCHEDULER SCHEDULER must either be unset, or set to one of "Affinity", "Rialto", "Robin", "Laxity", or "Min". $(LINKFLAGS) /NOLOGO /INCREMENTAL:NO /machine:$(Machine) /debug /debugtype:cv $(AFLAGS) /DTHREAD_TIME_ACCOUNTING=1 $(CFLAGS) /DTHREAD_TIME_ACCOUNTING=1 $(CPPFLAGS) /DTHREAD_TIME_ACCOUNTING=1 $(CSFLAGS) /d:THREAD_TIME_ACCOUNTING $(CSFLAGS) /d:SAMPLE_PC $(SGFLAGS) /d:SAMPLE_PC .Paging $(AFLAGS) /DPAGING=1 $(CFLAGS) /DPAGING $(CPPFLAGS) /DPAGING $(CSFLAGS) /d:PAGING $(SGFLAGS) /d:PAGING $(SINGULARITY_ROOT).obj $(SINGULARITY_OBJROOT) $(Configuration).$(MACHINE).$(PLATFORM).$(SCHEDULER).$(COLLECTOR_KERNEL)$(PAGING_FLAG) $(Configuration).$(MACHINE).$(COLLECTOR_APP)$(PAGING_FLAG) $(Configuration).$(MACHINE).$(COLLECTOR_APP)$(PAGING_FLAG) $(Configuration).$(MACHINE)$(PAGING_FLAG) $(Configuration).$(COLLECTOR_APP) $(SINGULARITY_OBJROOT)\Boot\$(Configuration).$(Machine) $(SINGULARITY_OBJROOT)\Drivers\$(OBJRELDIR) $(SINGULARITY_OBJROOT)\Libraries\$(OBJRELDIR) $(SINGULARITY_OBJROOT)\Apps\$(OBJRELDIR) $(SINGULARITY_OBJROOT)\Kernel\$(OBJKRNDIR).msil $(SINGULARITY_OBJROOT)\Kernel\$(OBJKRNDIR).native $(SINGULARITY_OBJROOT)\Interfaces $(SINGULARITY_OBJROOT)\AppRuntime\$(OBJRELDIR) $(SINGULARITY_OBJROOT)\AppRuntime\$(OBJRELDIR) $(SINGULARITY_OBJROOT)\AppRuntimeNative\$(OBJRELDIR) $(SINGULARITY_OBJROOT)\Windows\obj\$(OBJRELDIR) $(BASEDIR)\Windows\obj\$(OBJRELDIR) $(SINGULARITY_OUTPUT)\$(Configuration).$(MACHINE).$(Platform) $(SINGULARITY_OBJROOT)\nib.libcache\$(OBJRELRUNTIMEDIR) $(SINGULARITY_OBJROOT)\AppNativeObj\$(OBJRELRUNTIMEDIR) $(SINGULARITY_OBJROOT)\AppNativeImage\$(OBJRELRUNTIMEDIR) $(SINGULARITY_OBJROOT) $(APPRUNTIMEDIR)\Singularity.V1.lib $(BUILDDIR)\csc.exe $(BUILDDIR)\sgc.exe $(DEFAULT_CC) $(DEFAULT_AS) $(BUILDDIR)\ilasm.exe $(BUILDDIR)\ildasm.exe $(BUILDDIR)\lib.exe $(BUILDDIR)\link.exe $(BUILDDIR)\nib.exe $(DEFAULT_BARTOK) $(BUILDDIR)\NVidia true