diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 9629b2a46a4f..100e61708979 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -8,6 +8,7 @@ env:
   OPAMROOT: D:\opamroot
   OPAMSOLVERTIMEOUT: 120
   MSYS: winsymlinks:native
+  OCAMLRUNPARAM: b
 jobs:
   build:
     strategy:
@@ -112,7 +113,7 @@ jobs:
           opam update
           Foreach ($pkg in $pkgs) {
             Write-Host "::group::Testing `e[1;34m$pkg`e[0m"
-            opam install --color=always --confirm-level=unsafe-yes "$pkg"
+            opam install -vv --color=always --confirm-level=unsafe-yes "$pkg"
             Write-Host "::endgroup::"
             switch ($LASTEXITCODE) {
               0 { Write-Host "`e[1;32m$pkg installed successfully`e[0m."; Break }
diff --git a/packages/topkg/topkg.1.1.0/opam b/packages/topkg/topkg.1.1.0/opam
index 42c16f6cf553..591922420aac 100644
--- a/packages/topkg/topkg.1.1.0/opam
+++ b/packages/topkg/topkg.1.1.0/opam
@@ -41,10 +41,11 @@ depends: [
   "ocamlbuild"
 ]
 build: ["ocaml" "pkg/pkg.ml" "build" "--pkg-name" name "--dev-pkg" "%{dev}%"]
+flags: verbose
 dev-repo: "git+https://erratique.ch/repos/topkg.git"
 url {
   src: "https://erratique.ch/software/topkg/releases/topkg-1.1.0.tbz"
   checksum:
     "sha512=34d22ae5b6bd166dd4a601a7d12d89c336684b3c56d7c7f481b40837eab263616cc3a6e6f63602f3d4a7d53c911967bf261de6c1ac205341b98a9838e5ea7aeb"
 }
-x-maintenance-intent: ["(latest)"]
\ No newline at end of file
+x-maintenance-intent: ["(latest)"]