diff --git a/re2c/meta.yaml b/re2c/meta.yaml
index 8cf11e0..1d6fc26 100644
--- a/re2c/meta.yaml
+++ b/re2c/meta.yaml
@@ -11,6 +11,7 @@ source:
 
 requirements:
   build:
+    - ninja
     - {{ compiler('c') }} [not win]
     - {{ compiler('cxx') }} [not win]