commit 61c213c64452b17ff46ed43cd5b0e7101d9968fb
Author: Sebastien Bourdeauducq <sb@m-labs.hk>
Date:   Sat Jun 27 17:55:29 2020 +0800

    add README

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+![XBill](xbill.png)
+
+WFVM
+====
+
+A Nix library to create and manage virtual machines running Windows, a medieval operating system found on most computers in 2020. The F stands for "Functional" or a four-letter word of your choice.
+
+* Reproducible - everything runs in the Nix sandbox with no tricks.
+* Fully automatic, parameterizable Windows 10 installation.
+* Uses QEMU with KVM.
+* Supports incremental installation (using "layers") of additional software via QEMU copy-on-write backing chains.
+* Included layers: Anaconda3, a software installer chock full of bugs that pretends to be a package manager, Visual Studio, a spamming system for Microsoft accounts that includes a compiler, and MSYS2, which is the only sane component in the whole lot.
+* Supports running arbitrary commands in a VM image in snapshot mode inside a derivation and retrieve the result.
+* Network access from the VM is heavily restricted to avoid issues with Microsoft spyware and similar programs.
+* When used with Hydra, redistribution of nonfree content can be blocked.
+
+Example applications:
+* Creating reproducible Windows VM images with pre-installed software.
+* Compiling Conda packages with Visual Studio in a fully reproducible manner and without having to deal with the constant data corruption caused by Conda.
+* Running Windows unit tests on Hydra.
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