diff --git a/README.md b/README.md
index ac50b5a61..ba9f6e892 100644
--- a/README.md
+++ b/README.md
@@ -411,9 +411,6 @@ The following options can be used with CMake to configure the build. The default
 | SEAL_USE_CXX17         | **ON** / OFF                                                 | Set to `ON` to build Microsoft SEAL as C++17 for a positive performance impact.                                                                                                                        |
 | SEAL_USE_INTRIN        | **ON** / OFF                                                 | Set to `ON` to use compiler intrinsics for improved performance. CMake will automatically detect which intrinsics are available and enable them accordingly.                                           |
 
-| SEAL_PURE_SOURCETREE   | ON / **OFF**
-| When enabled, the SEAL build will only emit files into the cmake build directory. This includes third-party dependencies (both sources and binaries). This flag can improve compatibility with other build systems and enables concurrently building multiple instances of the SEAL library with different `cmake -B` options.
-
 As usual, these options can be passed to CMake with the `-D` flag.
 For example, one could run