diff --git a/conda/zipline/meta.yaml b/conda/zipline/meta.yaml
index 8f1a38a6..7191f399 100644
--- a/conda/zipline/meta.yaml
+++ b/conda/zipline/meta.yaml
@@ -16,13 +16,13 @@ source:
 requirements:
   build:
     - python {{ PY_VER }}*
-    - libgfortran ==1  # [np == 19]
+    - libgfortran ==1  # [(not win) and (np == 19)]
     {% for req in data.get('build_requires', []) -%}
     - {{req}}
     {% endfor %}
   run:
     - python
-    - libgfortran ==1 # [np == 19]
+    - libgfortran ==1 # [(not win) and (np == 19)]
     {% for req in data.get('install_requires', []) -%}
     - {{req}}
     {% endfor %}