diff --git a/x11/library/libdrm/pspec.xml b/x11/library/libdrm/pspec.xml
index 5655f623e3..060002fa74 100644
--- a/x11/library/libdrm/pspec.xml
+++ b/x11/library/libdrm/pspec.xml
@@ -16,6 +16,9 @@
         <BuildDependencies>
             <Dependency versionFrom="0.13.5">libpciaccess-devel</Dependency>
             <Dependency>util-macros</Dependency>
+            <Dependency>libxslt-devel</Dependency>
+            <Dependency>docbook-xsl</Dependency>
+            <Dependency>valgrind</Dependency>
         </BuildDependencies>
     </Source>