diff --git a/plugins/python-build/bin/pyenv-install b/plugins/python-build/bin/pyenv-install
index 766e9c51..f9ee37ec 100755
--- a/plugins/python-build/bin/pyenv-install
+++ b/plugins/python-build/bin/pyenv-install
@@ -213,7 +213,7 @@ if [ -z "${PYENV_BOOTSTRAP_VERSION}" ]; then
       done
     fi
     if [ -n "$PYENV_BOOTSTRAP_VERSION" ]; then
-      for dep in curses pycparser; do
+      for dep in curses genc pycparser; do
         if ! PYENV_VERSION="$PYENV_BOOTSTRAP_VERSION" pyenv-exec python -c "import ${dep}" 1>/dev/null 2>&1; then
           echo "pyenv-install: $VERSION_NAME: PyPy requires \`${dep}' in $PYENV_BOOTSTRAP_VERSION to build from source." >&2
           exit 1