diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a35e8fa..4f71405 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,7 +11,7 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Install dependencies
-      run: sudo apt-get install -y libgrantlee5-dev qt5-default qtdeclarative5-dev-tools
+      run: sudo apt-get install -y libgrantlee5-dev qt6-base-dev qt6-base-dev-tools qt6-declarative-dev qt6-declarative-dev-tools
 
     - name: Lint test script
       run: shellcheck ./tests/test-plugins.sh
diff --git a/gdb/linuxdeploy-plugin-gdb.sh b/gdb/linuxdeploy-plugin-gdb.sh
index 6fa1d13..f6beb57 100755
--- a/gdb/linuxdeploy-plugin-gdb.sh
+++ b/gdb/linuxdeploy-plugin-gdb.sh
@@ -3,9 +3,11 @@
 # exit whenever a command called in this script fails
 set -e
 
+
+verbose=()
 if [ "$DEBUG" != "" ]; then
     set -x
-    verbose="--verbose"
+    verbose+=("--verbose")
 fi
 
 appdir=""
@@ -55,7 +57,7 @@ if [ -z "$LINUXDEPLOY_PLUGIN_GDB_SRC" ]; then
 fi
 
 echo "Copying source files"
-cp --recursive $verbose "$LINUXDEPLOY_PLUGIN_GDB_SRC" "$appdir/usr/"
+cp --recursive "${verbose[@]}" "$LINUXDEPLOY_PLUGIN_GDB_SRC" "$appdir/usr/"
 
 echo "Installing new AppRun wrapper"
 # AppRun script does: exec "$this_dir"/AppRun.wrapped "$@"
@@ -63,7 +65,7 @@ echo "Installing new AppRun wrapper"
 # AppRun.wrapped.orig is the real application
 old_exe="$(readlink -f "$appdir/AppRun.wrapped")"
 new_exe="$old_exe.orig"
-mv $verbose "$old_exe" "$new_exe"
+mv "${verbose[@]}" "$old_exe" "$new_exe"
 cat > "$old_exe" <<EOF
 #! /bin/bash
 
@@ -73,4 +75,4 @@ else
 	exec "\$APPDIR/${new_exe#"$appdir"}" "\$@"
 fi
 EOF
-chmod $verbose 755 "$old_exe"
+chmod "${verbose[@]}" 755 "$old_exe"
diff --git a/tests/test-plugins.sh b/tests/test-plugins.sh
index 3130b35..c6fcfac 100755
--- a/tests/test-plugins.sh
+++ b/tests/test-plugins.sh
@@ -7,6 +7,7 @@ repodir="${REPODIR:-"$(git rev-parse --show-toplevel)"}"
 tempdir="$(mktemp --tmpdir --directory linuxdeploy-misc-plugin-XXXXX)"
 
 _cleanup() {
+    # shellcheck disable=SC2317
     [[ -d "$tempdir" ]] && rm -r "$tempdir"
 }
 trap _cleanup EXIT