diff --git a/python_bindings/CMakeLists.txt b/python_bindings/CMakeLists.txt
index 4fce89d..3310ebb 100644
--- a/python_bindings/CMakeLists.txt
+++ b/python_bindings/CMakeLists.txt
@@ -66,22 +66,17 @@ add_definitions(${LLVM_DEFINITIONS})
 
 mlir_configure_python_dev_packages()
 
-add_mlir_python_common_capi_library(
-  MLIRPythonCAPI
-  INSTALL_COMPONENT
-  MLIRPythonModules
-  INSTALL_DESTINATION
-  mlir/_mlir_libs
-  OUTPUT_DIRECTORY
-  "${MLIR_BINARY_DIR}/mlir/_mlir_libs"
-  RELATIVE_INSTALL_ROOT
-  "../../../.."
+add_mlir_python_common_capi_library(MLIRPythonCAPI
+  INSTALL_COMPONENT MLIRPythonModules
+  INSTALL_DESTINATION mlir/_mlir_libs
+  OUTPUT_DIRECTORY "${MLIR_BINARY_DIR}/mlir/_mlir_libs"
+  RELATIVE_INSTALL_ROOT "../../../.."
   DECLARED_HEADERS
-  MLIRPythonCAPI.HeaderSources
+    MLIRPythonCAPI.HeaderSources
   DECLARED_SOURCES
-  MLIRPythonSources
-  MLIRPythonExtension.RegisterEverything
-  ${_ADDL_TEST_SOURCES})
+    MLIRPythonSources
+    MLIRPythonExtension.RegisterEverything
+)
 
 # ##############################################################################
 # Custom targets.
@@ -98,15 +93,12 @@ endif()
 # The fully assembled package of modules. This must come last.
 # ##############################################################################
 
-add_mlir_python_modules(
-  MLIRPythonModules
-  ROOT_PREFIX
-  "${MLIR_BINARY_DIR}/mlir"
-  INSTALL_PREFIX
-  "mlir"
+add_mlir_python_modules(MLIRPythonModules
+  ROOT_PREFIX "${MLIR_BINARY_DIR}/mlir"
+  INSTALL_PREFIX "mlir"
   DECLARED_SOURCES
-  MLIRPythonSources
-  MLIRPythonExtension.RegisterEverything
-  ${_ADDL_TEST_SOURCES}
+    MLIRPythonSources
+    MLIRPythonExtension.RegisterEverything
   COMMON_CAPI_LINK_LIBS
-  MLIRPythonCAPI)
+    MLIRPythonCAPI
+)
diff --git a/python_bindings/setup.py b/python_bindings/setup.py
index 6e4b2c3..163744c 100644
--- a/python_bindings/setup.py
+++ b/python_bindings/setup.py
@@ -83,6 +83,10 @@ def build_extension(self, ext: CMakeExtension) -> None:
             f"-DCMAKE_INSTALL_PREFIX={install_dir}",
             f"-DPython3_EXECUTABLE={sys.executable}",
             f"-DCMAKE_BUILD_TYPE={cfg}",  # not used on MSVC, but no harm
+            # prevent symbol collision that leads to multiple pass registration and such
+            "-DCMAKE_VISIBILITY_INLINES_HIDDEN=ON",
+            "-DCMAKE_C_VISIBILITY_PRESET=hidden",
+            "-DCMAKE_CXX_VISIBILITY_PRESET=hidden",
         ]
         if platform.system() == "Windows":
             cmake_args += [
diff --git a/scripts/gh_releases.py b/scripts/gh_releases.py
index 6cbc7d3..6f7eb57 100644
--- a/scripts/gh_releases.py
+++ b/scripts/gh_releases.py
@@ -1,29 +1,50 @@
+import os
+import time
+
 from github import Github
+import datetime
 
 # Authentication is defined via github.Auth
 from github import Auth
 
 # using an access token
-auth = Auth.Token("Personal access tokens (classic)")
+auth = Auth.Token(os.environ["GITHUB_API_TOKEN"])
+
+twomonthsago = datetime.date.today() - datetime.timedelta(days=30)
 
 # First create a Github instance:
 
 # Public Web Github
 g = Github(auth=auth)
 
-repo = g.get_repo("makslevental/wheels")
-release = repo.get_release(113028511)
-assets = release.get_assets()
-for ass in assets:
-    if "18.0.0.20230907" in ass.name:
-        print(ass.name)
-        assert ass.delete_asset()
-
-
-repo = g.get_repo("makslevental/mlir-wheels")
-release = repo.get_release(111725799)
-assets = release.get_assets()
-for ass in assets:
-    if "18.0.0.20230907" in ass.name:
-        print(ass.name)
-        assert ass.delete_asset()
+n_deleted = 0
+for _ in range(100):
+    n_deleted = 0
+    repo = g.get_repo("makslevental/wheels")
+    release = repo.get_release(113028511)
+    assets = release.get_assets()
+    for ass in assets:
+        if "35ca6498" in ass.name:
+            continue
+        if ass.created_at.date() < twomonthsago:
+            print(ass.name)
+            assert ass.delete_asset()
+            n_deleted += 1
+
+    repo = g.get_repo("makslevental/mlir-wheels")
+    release = repo.get_release(111725799)
+    assets = release.get_assets()
+    for ass in assets:
+        if "35ca6498" in ass.name:
+            continue
+        if ass.created_at.date() < twomonthsago:
+            print(ass.name)
+            assert ass.delete_asset()
+            n_deleted += 1
+
+    if n_deleted == 0:
+        break
+    time.sleep(5)
+
+if n_deleted > 0:
+    raise Exception("missed some")
diff --git a/setup.py b/setup.py
index f71d073..35f39d0 100644
--- a/setup.py
+++ b/setup.py
@@ -118,6 +118,10 @@ def build_extension(self, ext: CMakeExtension) -> None:
             f"-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={extdir}{os.sep}",
             f"-DPython3_EXECUTABLE={sys.executable}",
             f"-DCMAKE_BUILD_TYPE={cfg}",  # not used on MSVC, but no harm
+            # prevent symbol collision that leads to multiple pass registration and such
+            "-DCMAKE_VISIBILITY_INLINES_HIDDEN=ON",
+            "-DCMAKE_C_VISIBILITY_PRESET=hidden",
+            "-DCMAKE_CXX_VISIBILITY_PRESET=hidden",
         ]
         if platform.system() == "Windows":
             cmake_args += [