diff --git a/multimedia/misc/opentimelineio/pspec.xml b/multimedia/misc/opentimelineio/pspec.xml
index 81f545b7b4..13dd92b218 100644
--- a/multimedia/misc/opentimelineio/pspec.xml
+++ b/multimedia/misc/opentimelineio/pspec.xml
@@ -16,6 +16,8 @@
         <Archive sha1sum="4e4fc37ace22d9eb4e8eb39004566c44b6100b7a" type="targz" target="OpenTimelineIO-0.17.0">https://github.com/Tencent/rapidjson/archive/24b5e7a8b27f42fa16b96fc70aade9106cf7102f/rapidjson-24b5e7a8b27f42fa16b96fc70aade9106cf7102f.tar.gz</Archive>
         <BuildDependencies>
             <Dependency>cmake</Dependency>
+            <Dependency>pybind11</Dependency>
+            <Dependency>imath</Dependency>
         </BuildDependencies>
         -->
         <!--