diff --git a/bob/devtools/data/recipe_append.yaml b/bob/devtools/data/recipe_append.yaml
index b8943cd0d6d46a015f7f07d2b215ee390342073f..25e260fdbce2e29ba6919df557026031594b47f8 100644
--- a/bob/devtools/data/recipe_append.yaml
+++ b/bob/devtools/data/recipe_append.yaml
@@ -4,6 +4,6 @@ build:
     - NOSE_EVAL_ATTR
     - PYTEST_ADDOPTS
 
-requirements:
-  build:
+requirements:  # [linux64]
+  build:  # [linux64]
     - sysroot_linux-64 2.17  # [linux64]