diff --git a/ci/docker/build-manylinux-images.sh b/ci/docker/build-manylinux-images.sh
old mode 100755
new mode 100644
diff --git a/ci/docker/manylinux_x86_64/build-scripts/install-cuda-11.6.sh b/ci/docker/manylinux_x86_64/build-scripts/install-cuda-11.6.sh
old mode 100755
new mode 100644
diff --git a/ci/docker/manylinux_x86_64/build-scripts/install-cuda-11.7.sh b/ci/docker/manylinux_x86_64/build-scripts/install-cuda-11.7.sh
old mode 100755
new mode 100644
diff --git a/ci/docker/manylinux_x86_64/build-scripts/install-cuda-11.8.sh b/ci/docker/manylinux_x86_64/build-scripts/install-cuda-11.8.sh
old mode 100755
new mode 100644
diff --git a/ci/docker/manylinux_x86_64/build-scripts/install-cuda-12.1.sh b/ci/docker/manylinux_x86_64/build-scripts/install-cuda-12.1.sh
old mode 100755
new mode 100644
diff --git a/ci/docker/manylinux_x86_64/build-scripts/install-llvm.sh b/ci/docker/manylinux_x86_64/build-scripts/install-llvm.sh
old mode 100755
new mode 100644
diff --git a/src/fairseq2/assets/download_manager.py b/src/fairseq2/assets/download_manager.py
index 1e2851811..5d90282dc 100644
--- a/src/fairseq2/assets/download_manager.py
+++ b/src/fairseq2/assets/download_manager.py
@@ -191,7 +191,13 @@ def download_dataset(
 
         return op.run()
 
-    def _validate_asset_integrity(self, path: Path, checksum: str) -> None:
+    def _validate_asset_integrity(self, path: Path, checksum: str | None) -> None:
+        if checksum is None:
+            log.warning(
+                f"Asset at {path} has no recorded checksum, skipping integrity check."
+            )
+            return
+
         BYTES_PER_CHUNK = 65536
         sha = sha1()
 
@@ -201,7 +207,7 @@ def _validate_asset_integrity(self, path: Path, checksum: str) -> None:
 
         if sha.hexdigest() != checksum:
             raise AssetDownloadError(
-                "Downloaded asset checksum does not match the expected checksum."
+                f"Checksum for {path} checksum does not match the expected checksum."
             )
 
 
diff --git a/tools/run-shellcheck.sh b/tools/run-shellcheck.sh
old mode 100755
new mode 100644
diff --git a/tools/set-project-version.sh b/tools/set-project-version.sh
old mode 100755
new mode 100644