diff --git a/CHANGES.md b/CHANGES.md
index 76bc514f61a..a5af5b87b9c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -79,6 +79,8 @@
 - Set up formatting rules by default. They can be configured through a new
   `(formatting)` stanza in `dune-project` (#2347, fixes #2315, @emillon)
 
+- Change default target from `@install` to `@all`. (#2449, @rgrinberg)
+
 1.11.0 (23/07/2019)
 -------------------
 
diff --git a/src/build_system.ml b/src/build_system.ml
index 6ac65dddf28..03d301f820d 100644
--- a/src/build_system.ml
+++ b/src/build_system.ml
@@ -735,10 +735,20 @@ end = struct
             match File_tree.find_dir t.file_tree src_dir with
             | None -> aliases
             | Some dir ->
+              let default_alias =
+                let dune_version =
+                  File_tree.Dir.project dir
+                  |> Dune_project.dune_version
+                in
+                if dune_version >= (2, 0) then
+                  "all"
+                else
+                  "install"
+              in
               String.Map.set aliases "default"
                 { deps = Path.Set.empty
                 ; dyn_deps =
-                    (Alias0.dep_rec_internal ~name:"install" ~dir ~ctx_dir
+                    (Alias0.dep_rec_internal ~name:default_alias ~dir ~ctx_dir
                      >>^ fun (_ : bool) ->
                      Path.Set.empty)
                 ; actions = Appendable_list.empty
diff --git a/src/gen_rules.ml b/src/gen_rules.ml
index 760a3131bab..f9cc945d2b1 100644
--- a/src/gen_rules.ml
+++ b/src/gen_rules.ml
@@ -216,7 +216,6 @@ module Gen(P : sig val sctx : Super_context.t end) = struct
         |> SC.add_rules ~dir:ctx_dir sctx
       | _ -> ());
     let dyn_deps =
-      (* DUNE2: no need to filter out js targets anymore *)
       let pred =
         let id = lazy (
           let open Dyn.Encoder in
diff --git a/test/blackbox-tests/test-cases/dune-init/run.t b/test/blackbox-tests/test-cases/dune-init/run.t
index 2ebd7d0cdfd..fcaf063bb49 100644
--- a/test/blackbox-tests/test-cases/dune-init/run.t
+++ b/test/blackbox-tests/test-cases/dune-init/run.t
@@ -299,10 +299,17 @@ Can init and build a new executable project
   dune
   test_exec_proj.ml
 
-  $ cd test_exec_proj && dune build
+  $ dune exec --root test_exec_proj ./bin/main.exe
+  Entering directory 'test_exec_proj'
   Info: Creating file dune-project with this contents:
   | (lang dune 2.0)
   | (name test_exec_proj)
+  Entering directory 'test_exec_proj'
+  Hello, World!
+
+  $ dune exec --root test_exec_proj ./test/test_exec_proj.exe
+  Entering directory 'test_exec_proj'
+  Entering directory 'test_exec_proj'
   $ rm -rf ./test_exec_proj
 
 Can init and build a new library project
@@ -320,10 +327,25 @@ Can init and build a new library project
   dune
   test_lib_proj.ml
 
-  $ cd test_lib_proj && dune build
+  $ dune build --root test_lib_proj @install --display short
+  Entering directory 'test_lib_proj'
   Info: Creating file dune-project with this contents:
   | (lang dune 2.0)
   | (name test_lib_proj)
+        ocamlc lib/.test_lib_proj.objs/byte/test_lib_proj.{cmi,cmo,cmt}
+        ocamlc lib/test_lib_proj.cma
+      ocamlopt lib/.test_lib_proj.objs/native/test_lib_proj.{cmx,o}
+      ocamlopt lib/test_lib_proj.{a,cmxa}
+      ocamlopt lib/test_lib_proj.cmxs
+
+  $ dune runtest --root test_lib_proj --display short
+  Entering directory 'test_lib_proj'
+      ocamldep test/.test_lib_proj.eobjs/test_lib_proj.ml.d
+        ocamlc test/.test_lib_proj.eobjs/byte/dune__exe__Test_lib_proj.{cmi,cmo,cmt}
+      ocamlopt test/.test_lib_proj.eobjs/native/dune__exe__Test_lib_proj.{cmx,o}
+      ocamlopt test/test_lib_proj.exe
+  test_lib_proj alias test/runtest
+
 Can init and build a project using Esy
 
   $ dune init proj test_esy_proj --pkg esy
diff --git a/test/blackbox-tests/test-cases/dune-project-edition/run.t b/test/blackbox-tests/test-cases/dune-project-edition/run.t
index 3da59ccb13e..6db66e56cc1 100644
--- a/test/blackbox-tests/test-cases/dune-project-edition/run.t
+++ b/test/blackbox-tests/test-cases/dune-project-edition/run.t
@@ -11,7 +11,7 @@
 Test that using menhir automatically update the dune-project file
 
   $ echo '(library (name x)) (menhir (modules x))' >> src/dune
-  $ dune build
+  $ dune build @install
   Info: Appending this line to dune-project: (using menhir 2.0)
   $ cat dune-project
   (lang dune 2.0)
diff --git a/test/blackbox-tests/test-cases/github1529/run.t b/test/blackbox-tests/test-cases/github1529/run.t
index 40e0494e3c8..7503ebeeec3 100644
--- a/test/blackbox-tests/test-cases/github1529/run.t
+++ b/test/blackbox-tests/test-cases/github1529/run.t
@@ -1,7 +1,7 @@
 Reproduction case for #1529: using an extension when no dune-project
 file is present.
 
-  $ dune build
+  $ dune build @install
   Info: Creating file dune-project with this contents:
   | (lang dune 2.0)
   Info: Appending this line to dune-project: (using menhir 2.0)
diff --git a/test/blackbox-tests/test-cases/github1549/run.t b/test/blackbox-tests/test-cases/github1549/run.t
index 62a21f45a44..ed89de4e414 100644
--- a/test/blackbox-tests/test-cases/github1549/run.t
+++ b/test/blackbox-tests/test-cases/github1549/run.t
@@ -1,6 +1,6 @@
 Reproduction case for #1549: too many parentheses in installed .dune files
 
-  $ dune build --root backend
+  $ dune build @install --root backend
   Entering directory 'backend'
 
   $ cat backend/_build/install/default/lib/dune_inline_tests/dune-package
diff --git a/test/blackbox-tests/test-cases/github2033/run.t b/test/blackbox-tests/test-cases/github2033/run.t
index 869c0edafa4..6400635fdc1 100644
--- a/test/blackbox-tests/test-cases/github2033/run.t
+++ b/test/blackbox-tests/test-cases/github2033/run.t
@@ -1,2 +1,2 @@
 . should be allowed in c names
-  $ dune build
+  $ dune build @install
diff --git a/test/blackbox-tests/test-cases/optional/run.t b/test/blackbox-tests/test-cases/optional/run.t
index 7750d0d411b..0b1025aad19 100644
--- a/test/blackbox-tests/test-cases/optional/run.t
+++ b/test/blackbox-tests/test-cases/optional/run.t
@@ -4,7 +4,7 @@ Various tests for optional libraries
 Regression test for non-wrapped optional libraries with missing
 dependencies (#1281):
 
-  $ dune build
+  $ dune build @install
 
 Interaction between `@all` and optional libraries:
 
diff --git a/test/blackbox-tests/test-cases/private-public-overlap/run.t b/test/blackbox-tests/test-cases/private-public-overlap/run.t
index 87fc040696e..cae689ee095 100644
--- a/test/blackbox-tests/test-cases/private-public-overlap/run.t
+++ b/test/blackbox-tests/test-cases/private-public-overlap/run.t
@@ -52,5 +52,5 @@ However, public binaries may accept private dependencies
       ocamlopt publicbin.exe
 
 Private dependencies shouldn't make the library optional
-  $ dune build --display short --root optional
+  $ dune build @install --display short --root optional
   Entering directory 'optional'
diff --git a/test/blackbox-tests/test-cases/use-meta/run.t b/test/blackbox-tests/test-cases/use-meta/run.t
index da00f8014ed..4f4c5fd15b3 100644
--- a/test/blackbox-tests/test-cases/use-meta/run.t
+++ b/test/blackbox-tests/test-cases/use-meta/run.t
@@ -1,2 +1,2 @@
-  $ dune build && dune exec -- ocamlfind opt -package foobarlib -linkpkg main.ml -o main.exe && ./main.exe
+  $ dune build @install && dune exec -- ocamlfind opt -package foobarlib -linkpkg main.ml -o main.exe && ./main.exe
   foobarlib
diff --git a/test/blackbox-tests/test-cases/variants/run.t b/test/blackbox-tests/test-cases/variants/run.t
index a04d7f37fba..fb6d9819d2d 100644
--- a/test/blackbox-tests/test-cases/variants/run.t
+++ b/test/blackbox-tests/test-cases/variants/run.t
@@ -38,7 +38,7 @@ variants and finally default implementation.
 
 Check that variant data is installed in the dune package file.
 
-  $ dune build --root dune-package
+  $ dune build @install --root dune-package
   Entering directory 'dune-package'
   $ cat  dune-package/_build/install/default/lib/a/dune-package
   (lang dune 2.0)
diff --git a/test/blackbox-tests/test-cases/vendor/duniverse/dune-project b/test/blackbox-tests/test-cases/vendor/duniverse/dune-project
index 0636ab6acf4..929c696e561 100644
--- a/test/blackbox-tests/test-cases/vendor/duniverse/dune-project
+++ b/test/blackbox-tests/test-cases/vendor/duniverse/dune-project
@@ -1 +1 @@
-(lang dune 1.11)
+(lang dune 2.0)
diff --git a/test/blackbox-tests/test-cases/vendor/duniverse/duniverse/vendored/dune-project b/test/blackbox-tests/test-cases/vendor/duniverse/duniverse/vendored/dune-project
index bc29044968d..d58b8a48151 100644
--- a/test/blackbox-tests/test-cases/vendor/duniverse/duniverse/vendored/dune-project
+++ b/test/blackbox-tests/test-cases/vendor/duniverse/duniverse/vendored/dune-project
@@ -1,2 +1,2 @@
-(lang dune 1.10)
+(lang dune 2.0)
 (name vendored)
diff --git a/test/blackbox-tests/test-cases/vendor/run.t b/test/blackbox-tests/test-cases/vendor/run.t
index 7af417fcd32..5d40424194d 100644
--- a/test/blackbox-tests/test-cases/vendor/run.t
+++ b/test/blackbox-tests/test-cases/vendor/run.t
@@ -1,6 +1,6 @@
 Vendored directories should be traversed to find targets so that they are built when they are depend upon
 
-  $ dune build --root duniverse
+  $ dune build --root duniverse --debug-dependency-path
   Entering directory 'duniverse'
 
 Aliases should not be resolved in vendored sub directories