diff --git a/install-timelord.sh b/install-timelord.sh
index 1cf12deba1f5..35583f06c447 100755
--- a/install-timelord.sh
+++ b/install-timelord.sh
@@ -113,8 +113,11 @@ else
     symlink_vdf_bench "$PYTHON_VERSION"
   elif [ -e venv/bin/python ] && test "$MACOS"; then
     echo "Installing chiavdf dependencies for MacOS."
+    if ! cmake --version >/dev/null 2>&1; then
+      brew install --formula --quiet cmake
+    fi
     # The most recent boost version causes compile errors.
-    brew install --formula --quiet boost@1.85 cmake gmp
+    brew install --formula --quiet boost@1.85 gmp
     # boost@1.85 is keg-only, which means it was not symlinked into /usr/local,
     # because this is an alternate version of another formula.
     export LDFLAGS="-L/usr/local/opt/boost@1.85/lib"