Acme is a programmer's text editor, shell, and user interface. It runs on a virtualized operating system, Inferno, that runs hosted on Windows, Linux, Solaris, and MacOSX.
See this video for a nice walk through of Acme: https://www.youtube.com/watch?v=dP1xVpMPn8M
You can build the limbo source tree from inside acme:
% cd /appl/ % mk install
To build the Acme.exe follow these steps.
Download Install Microsoft Visual Studio Community Edition; include the C++ language package (this is now a custom option).
Open a developer command prompt from the Visual Studio start menu folder
Launch Acme.exe from inside the command prompt
Inside Acme open a command window by clicking the middle mouse button on the word win.
At the win command prompt type the following:
% cd /sys % run Nt/profile % mk
The mk command will build all the C libraries and inferno emulator. The iacme.exe should be in the /sys/emu/Nt folder.