diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e72e4bac4..14b38f090 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,6 +30,6 @@ jobs:
 
       - run: opam install ${{ matrix.local-packages }} --deps-only --with-test
 
-      - run: opam exec -- dune build
+      - run: opam exec -- dune build --only-packages ${{ matrix.local-packages }}
 
-      - run: opam exec -- dune runtest
+      - run: opam exec -- dune runtest --only-packages ${{ matrix.local-packages }}
diff --git a/lib_eio_linux/tests/dune b/lib_eio_linux/tests/dune
index 97299a45d..2acbb0cbf 100644
--- a/lib_eio_linux/tests/dune
+++ b/lib_eio_linux/tests/dune
@@ -1,3 +1,9 @@
+(* -*- tuareg -*- *)
+
+let linux = List.mem ("system", "linux") Jbuild_plugin.V1.ocamlc_config
+
+let () = Jbuild_plugin.V1.send @@ if not linux then "" else {|
+
 (library
  (name eurcp_lib)
  (enabled_if (= %{system} "linux"))
@@ -33,3 +39,4 @@
   (package eio_linux)
   (enabled_if (= %{system} "linux"))
   (deps (package eio_linux)))
+|}