diff --git a/.github/workflows/install-bindist.sh b/.github/workflows/install-bindist.sh
index 785478a..1e37d61 100755
--- a/.github/workflows/install-bindist.sh
+++ b/.github/workflows/install-bindist.sh
@@ -14,7 +14,14 @@ ghcup --version
 which ghcup | grep foobarbaz
 
 ghcup_fun() {
-	ghcup -v --url-source="file:$METADATA_FILE" "$@"
+	case "$(uname -s)" in
+		MSYS_*|MINGW*)
+			ghcup -v --url-source="file:${GITHUB_WORKSPACE//\\//}/$METADATA_FILE" "$@"
+			;;
+		*)
+			ghcup -v --url-source="file://${GITHUB_WORKSPACE}/$METADATA_FILE" "$@"
+			;;
+	esac
 }
 
 case $TOOL in
@@ -26,7 +33,6 @@ case $TOOL in
 esac
 
 mkdir -p /tmp/install-bindist-ci
-cp "$METADATA_FILE" /tmp/install-bindist-ci/
 cd /tmp/install-bindist-ci
 
 trap 'rm -rf -- /tmp/install-bindist-ci' EXIT
@@ -62,7 +68,6 @@ case $TOOL in
 			cd "$tmp_dir"
 			cabal unpack "${test_package}"
 			cd "${test_package}"
-			cp "/tmp/install-bindist-ci/${METADATA_FILE}" .
 		}
 
 		# For all HLS GHC versions and the wrapper, run 'typecheck'
diff --git a/cabal.project b/cabal.project
index 64d5ad1..f4b8e64 100644
--- a/cabal.project
+++ b/cabal.project
@@ -7,7 +7,7 @@ package ghcup
 source-repository-package
   type: git
   location: https://github.com/haskell/ghcup-hs.git
-  tag: b1106985ec1173a0122f2781719e9bb1a85de257
+  tag: 91ef2c7666d118bc6bd7d2fc2eeb7754081a9f3d
 
 constraints: http-io-streams -brotli,
              any.aeson >= 2.0.1.0
diff --git a/ghcup-gen/ghcup-gen.cabal b/ghcup-gen/ghcup-gen.cabal
index 2524595..404372e 100644
--- a/ghcup-gen/ghcup-gen.cabal
+++ b/ghcup-gen/ghcup-gen.cabal
@@ -52,7 +52,7 @@ executable ghcup-gen
     , deepseq               ^>=1.4
     , filepath              ^>=1.4.2.1
     , ghcup                 ^>=0.1.19.0
-    , haskus-utils-variant  ^>=3.2
+    , haskus-utils-variant  ^>=3.3
     , libarchive            ^>=3.0.3.0
     , megaparsec            >=8.0.0      && <9.3
     , mtl                   ^>=2.2