diff --git a/artiq-fast/wfvm/layers/default.nix b/artiq-fast/wfvm/layers/default.nix
index 9378705..415a0bd 100644
--- a/artiq-fast/wfvm/layers/default.nix
+++ b/artiq-fast/wfvm/layers/default.nix
@@ -61,6 +61,21 @@
       win-exec installmsyspackages
       '';
   };
+  cmake = {
+    name = "CMake";
+    script = let
+      cmake = pkgs.fetchurl {
+        name = "cmake.msi";
+        url = "https://github.com/Kitware/CMake/releases/download/v3.18.0-rc1/cmake-3.18.0-rc1-win64-x64.msi";
+        sha256 = "1n32jzbg9w3vfbvyi9jqijz97gn1zsk1w5226wlrxd2a9d4w1hrn";
+      };
+    in
+      ''
+      ln -s ${cmake} cmake.msi
+      win-put cmake.msi
+      win-exec "msiexec.exe /q /i cmake.msi ADD_CMAKE_TO_PATH=System"
+      '';
+  };
   msvc = {
     name = "MSVC";
     script = let