diff --git a/lib/picos/index.mld b/lib/picos/index.mld
index b06ab18a..c061e20f 100644
--- a/lib/picos/index.mld
+++ b/lib/picos/index.mld
@@ -1,5 +1,16 @@
 {0 Picos — Interoperable effects based concurrency}
 
+This packages contains the core {!Picos} interface library and auxiliary
+libraries for dealing with the OCaml multithreading architecture.
+
+{1 Libraries}
+
+{!modules:
+  Picos
+  Picos_domain
+  Picos_thread
+}
+
 {1 Introduction}
 
 {!Picos} is a {{:https://en.wikipedia.org/wiki/Systems_programming} systems
@@ -126,14 +137,6 @@ it is perhaps illuminating to explicitly mention some of those:
 Let's build an incredible ecosystem of interoperable concurrent programming
 libraries and frameworks!
 
-{1 Libraries}
-
-{!modules:
-  Picos
-  Picos_domain
-  Picos_thread
-}
-
 {1 Conventions}
 
 Many operation in the Picos libraries use