diff --git a/CHANGES.md b/CHANGES.md
index fe7757187b6..7e59c279fbb 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -150,6 +150,8 @@
   successful exit codes of `<action>`. `<pred>` is specified using the predicate
   language. (#2699, @nojb)
 
+- Do not setup rules for disabled libraries (#2491, fixes #2272, @bobot)
+
 1.11.4 (09/10/2019)
 -------------------
 
diff --git a/src/dune/gen_rules.ml b/src/dune/gen_rules.ml
index 08cbeedf83f..e0cb7c401a4 100644
--- a/src/dune/gen_rules.ml
+++ b/src/dune/gen_rules.ml
@@ -64,13 +64,15 @@ end = struct
     }
 
   let of_stanza stanza ~sctx ~src_dir ~ctx_dir ~scope ~dir_contents ~expander
-      ~files_to_install =
+        ~files_to_install =
     let dir = ctx_dir in
     match stanza with
     | Toplevel toplevel ->
       Toplevel_rules.setup ~sctx ~dir ~toplevel;
       empty_none
-    | Library lib ->
+    | Library lib
+      when Lib.DB.available (Scope.libs scope)
+             (Dune_file.Library.best_name lib) ->
       let cctx, merlin =
         Lib_rules.rules lib ~sctx ~dir ~scope ~dir_contents ~expander
       in
@@ -89,9 +91,9 @@ end = struct
       ; js =
           Some
             (List.concat_map exes.names ~f:(fun (_, exe) ->
-                 List.map
-                   [ exe ^ ".bc.js"; exe ^ ".bc.runtime.js" ]
-                   ~f:(Path.Build.relative dir)))
+               List.map
+                 [ exe ^ ".bc.js"; exe ^ ".bc.runtime.js" ]
+                 ~f:(Path.Build.relative dir)))
       ; source_dirs = None
       }
     | Alias alias ->
diff --git a/test/blackbox-tests/test-cases/github2272/run.t b/test/blackbox-tests/test-cases/github2272/run.t
index ed7a66e63ac..f3283ae0315 100644
--- a/test/blackbox-tests/test-cases/github2272/run.t
+++ b/test/blackbox-tests/test-cases/github2272/run.t
@@ -1,8 +1,2 @@
 The @all alias should only build enabled libraries
   $ dune build @all --display short
-      ocamldep disabled/.foo.objs/foo.ml.d
-        ocamlc disabled/.foo.objs/byte/foo.{cmi,cmo,cmt}
-        ocamlc disabled/foo.cma
-      ocamlopt disabled/.foo.objs/native/foo.{cmx,o}
-      ocamlopt disabled/foo.{a,cmxa}
-      ocamlopt disabled/foo.cmxs
diff --git a/test/blackbox-tests/test-cases/optional/run.t b/test/blackbox-tests/test-cases/optional/run.t
index 0b1025aad19..952c54a3c00 100644
--- a/test/blackbox-tests/test-cases/optional/run.t
+++ b/test/blackbox-tests/test-cases/optional/run.t
@@ -9,9 +9,3 @@ dependencies (#1281):
 Interaction between `@all` and optional libraries:
 
   $ dune build @all
-  File "dune", line 6, characters 12-34:
-  6 |  (libraries lib_that_doesn't_exist))
-                  ^^^^^^^^^^^^^^^^^^^^^^
-  Error: Library "lib_that_doesn't_exist" not found.
-  Hint: try: dune external-lib-deps --missing @all
-  [1]