diff --git a/master/master.cfg b/master/master.cfg
index f332945..b8a2cec 100644
--- a/master/master.cfg
+++ b/master/master.cfg
@@ -452,8 +452,9 @@ def get_cmake_definitions(builder_type, halide_target="host", wasm_jit="wabt", e
     if builder_type.has_ccache() and not builder_type.sanitizer_preset():
         cmake_definitions["Halide_CCACHE_BUILD"] = "ON"
 
+    cmake_definitions["CMAKE_TOOLCHAIN_FILE"] = Interpolate("%(prop:VCPKG_ROOT)s/scripts/buildsystems/vcpkg.cmake")
+
     if builder_type.os == "windows":
-        cmake_definitions["CMAKE_TOOLCHAIN_FILE"] = Interpolate("%(prop:VCPKG_ROOT)s/scripts/buildsystems/vcpkg.cmake")
         # CMake on Windows can't reliably find our pip-installed PyBind11 unless we set pybind11_ROOT to point to it
         cmake_definitions["pybind11_ROOT"] = Property("VIRTUAL_ENV")