Explicitly install ubuntu deps in ci

Author: gridbugs

.github/workflows/test.yml

@@ -21,6 +21,11 @@ jobs:
       uses: ocaml/setup-ocaml@v2
       with:
         ocaml-compiler: "4.14.1"
+    - if: matrix.os == 'ubuntu-latest'
+      name: 'Install dependencies (ubuntu)'
+      run: |
+        sudo apt update
+        sudo apt install libasound2-dev libsdl2-dev
     - run: opam install . --deps-only --with-test
     - run: opam exec -- dune build
     - run: opam exec -- dune runtest
@@ -48,6 +53,11 @@ jobs:
       with:
         ocaml-compiler: "4.14.1"
         opam-depext-flags: tsdl,conf-pkg-config,conf-alsa
+    - if: matrix.os == 'ubuntu-latest'
+      name: 'Install dependencies (ubuntu)'
+      run: |
+        sudo apt update
+        sudo apt install libasound2-dev libsdl2-dev
     - if: matrix.os == 'macOS-latest'
       name: Set-up OCaml
       uses: ocaml/setup-ocaml@v2