diff --git a/dune-project b/dune-project
index 16ac3e77..cd123544 100644
--- a/dune-project
+++ b/dune-project
@@ -50,4 +50,17 @@
     (trace-tef :with-test)
     (odoc :with-doc)))
 
+(package
+  (name moonpool-io)
+  (synopsis "Async IO for moonpool, relying on picos")
+  (allow_empty)  ; on < 5.0
+  (depends
+    (moonpool (= :version))
+    picos_stdio
+    (ocaml (>= 5.0))
+    (trace :with-test)
+    (trace-tef :with-test)
+    (odoc :with-doc)))
+
+
 ; See the complete stanza docs at https://dune.readthedocs.io/en/stable/dune-files.html#dune-project
diff --git a/moonpool-io.opam b/moonpool-io.opam
new file mode 100644
index 00000000..97eefe0b
--- /dev/null
+++ b/moonpool-io.opam
@@ -0,0 +1,33 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+version: "0.6"
+synopsis: "Async IO for moonpool, relying on picos"
+maintainer: ["Simon Cruanes"]
+authors: ["Simon Cruanes"]
+license: "MIT"
+homepage: "https://github.com/c-cube/moonpool"
+bug-reports: "https://github.com/c-cube/moonpool/issues"
+depends: [
+  "dune" {>= "3.0"}
+  "moonpool" {= version}
+  "picos_stdio"
+  "ocaml" {>= "5.0"}
+  "trace" {with-test}
+  "trace-tef" {with-test}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/c-cube/moonpool.git"
diff --git a/src/io/dune b/src/io/dune
new file mode 100644
index 00000000..2c01d4f9
--- /dev/null
+++ b/src/io/dune
@@ -0,0 +1,5 @@
+(library
+ (name moonpool_io)
+ (public_name moonpool-io)
+ (synopsis "Async IO for moonpool, using Picos")
+ (libraries moonpool picos_stdio picos_stdio.select picos_stdio.fd))
diff --git a/src/io/moonpool_io.ml b/src/io/moonpool_io.ml
new file mode 100644
index 00000000..198a9671
--- /dev/null
+++ b/src/io/moonpool_io.ml
@@ -0,0 +1,11 @@
+module Fd = Picos_stdio_fd
+module Unix = Picos_stdio.Unix
+module Select = Picos_stdio_select
+
+let fd_of_unix_fd : Unix.file_descr -> Fd.t = Fun.id
+let configure = Select.configure
+
+(** {2 Async read/write} *)
+
+let read = Unix.read
+let write = Unix.write