diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b127e44a0..061348d75 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,6 +15,7 @@ jobs:
         sudo apt-get update;
         sudo apt-get --no-install-recommends install
         catch2
+        cmake
         libfreetype6-dev
         libglew-dev
         libglm-dev
diff --git a/INSTALL b/INSTALL
index 08a6776af..9948ea39e 100644
--- a/INSTALL
+++ b/INSTALL
@@ -8,6 +8,7 @@ See also: http://pymolwiki.org/index.php/Linux_Install
 REQUIREMENTS
 
     - C++17 compiler (e.g. gcc 8+)
+    - CMake (3.12+)
     - Python 3.6+
     - Pmw (Python Megawidgets) (optional, for legacy GUI/plugins)
       https://github.com/schrodinger/pmw-patched