diff --git a/requirements-swh.txt b/requirements-swh.txt
new file mode 100644
--- /dev/null
+++ b/requirements-swh.txt
@@ -0,0 +1 @@
+# Add here internal Software Heritage dependencies, one per line.
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -3,13 +3,13 @@
 
 def parse_requirements():
     requirements = []
-    with open('requirements.txt') as f:
-        for line in f.readlines():
-            line = line.strip()
-            if not line or line.startswith('#'):
-                continue
-            requirements.append(line)
-
+    for reqf in ('requirements.txt', 'requirements-swh.txt'):
+        with open(reqf) as f:
+            for line in f.readlines():
+                line = line.strip()
+                if not line or line.startswith('#'):
+                    continue
+                requirements.append(line)
     return requirements