diff --git a/README.md b/README.md
index cd8ff27..961b0ba 100644
--- a/README.md
+++ b/README.md
@@ -33,8 +33,10 @@ TERRASARX, and UAVSAR.
    - [Note On 'python3' Exectuable Convention](#python3-convention)
    - [License required for dependencies to enable some workflows in ISCE](#license-required-for-dependencies-to-enable-some-workflows-in-isce)
 2. [Building ISCE](#building-isce)
-   - [Configuration control: SCONS\_CONFIG\_DIR and SConfigISCE](#configuration-control)
-   - [Install ISCE](#install-isce)
+   - [SCons](#scons-recommended)
+     - [Configuration control: SCONS\_CONFIG\_DIR and SConfigISCE](#configuration-control)
+     - [Install ISCE](#install-isce)
+   - [CMake](#cmake-experimental)
    - [Setup Your Environment](#setup-your-environment)
 3. [Running ISCE](#running-isce)
    - [Running ISCE from the command line](#running-isce-from-the-command-line)