diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c153f8909d..7e1c4a526d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,7 +34,7 @@ jobs:
         run: rustup show
 
       - name: Install libgcc
-        run: sudo apt-get install -y libgcc1 && sudo ldconfig
+        run: sudo ldconfig
 
       # We require a minimal Go version of 1.17.
       - uses: actions/setup-go@v2
diff --git a/crates/connector_proxy/src/interceptors/airbyte_source_interceptor.rs b/crates/connector_proxy/src/interceptors/airbyte_source_interceptor.rs
index 238a66ba86..5d71bb5266 100644
--- a/crates/connector_proxy/src/interceptors/airbyte_source_interceptor.rs
+++ b/crates/connector_proxy/src/interceptors/airbyte_source_interceptor.rs
@@ -247,13 +247,17 @@ impl AirbyteSourceInterceptor {
                                     supported_sync_modes: vec![resource.sync_mode.clone()],
                                     default_cursor_field: None,
                                     source_defined_cursor: None,
-                                    source_defined_primary_key: None, // ???
+                                    source_defined_primary_key: None,
                                 },
                                 projections: projections,
                             });
                         }
                     }
 
+                    if let Err(e) = catalog.validate() {
+                        raise_custom_error(&format!("invalid config_catalog: {:?}", e))?
+                    }
+
                     serde_json::to_writer(File::create(catalog_file_path)?, &catalog)?
                 }