diff --git a/.github/workflows/win_cli_build.yml b/.github/workflows/win_cli_build.yml
index 0dd1fc0..2c38af1 100644
--- a/.github/workflows/win_cli_build.yml
+++ b/.github/workflows/win_cli_build.yml
@@ -20,7 +20,7 @@ jobs:
           # Github runners have two installations of vcpkg, one from Visual
           # Studio and one extra. Use the second one explicitly to avoid mixups.
           $env:VCPKG_ROOT = "C:\vcpkg"
-          & $env:VCPKG_ROOT/vcpkg install --triplet x64-windows-static sqlite3
+          & $env:VCPKG_ROOT/vcpkg install --triplet x64-windows-static sqlite3[rtree]
           & $env:VCPKG_ROOT/vcpkg install --triplet x64-windows-static libpq[openssl]
           cd $env:GITHUB_WORKSPACE/geodiff
           mkdir build
diff --git a/geodiff/src/drivers/sqliteutils.cpp b/geodiff/src/drivers/sqliteutils.cpp
index 6d5b020..ebfe9c0 100644
--- a/geodiff/src/drivers/sqliteutils.cpp
+++ b/geodiff/src/drivers/sqliteutils.cpp
@@ -234,10 +234,11 @@ void register_gpkg_extensions( std::shared_ptr<Sqlite3Db> db )
     throwSqliteError( db->get(), "Failed to enable SQLite extensions loading" );
   }
 
-  rc = sqlite3_gpkg_auto_init( db->get(), NULL, NULL );
-  if ( rc )
+  const char *errmsg = "";
+  rc = sqlite3_gpkg_auto_init( db->get(), &errmsg, NULL );
+  if ( rc != SQLITE_OK )
   {
-    throwSqliteError( db->get(), "Failed to initialize GPKG extension" );
+    throw GeoDiffException( "Failed to initialize GPKG extension [" + std::to_string( rc ) + "]: " + std::string( errmsg ) );
   }
 }