diff --git a/x11/library/mesa/pspec.xml b/x11/library/mesa/pspec.xml
index dc73d8586f..2ac1acc875 100644
--- a/x11/library/mesa/pspec.xml
+++ b/x11/library/mesa/pspec.xml
@@ -65,6 +65,7 @@
             <Dependency>lm_sensors-devel</Dependency>
             <Dependency>xcb-util-keysyms-devel</Dependency>
             <Dependency>python3-PLY</Dependency>
+            <Dependency>python3-PyYAML</Dependency>
             <Dependency>python3-packaging</Dependency>
             <Dependency versionFrom="1.614.0">DirectX-headers-devel</Dependency>