diff --git a/tools/build_site.py b/tools/build_site.py
index 8c5f9e3..ccbe396 100644
--- a/tools/build_site.py
+++ b/tools/build_site.py
@@ -110,6 +110,20 @@ def _redirect(target: str, title: str) -> str:
     )
 
 
+def repository_paths(manifest_path: Path, manifest: dict[str, Any]) -> dict[str, Path]:
+    """Resolve local or fetched source checkouts for a publication manifest."""
+    source_root = os.environ.get("POLICY_NEXUS_SOURCE_ROOT")
+    paths: dict[str, Path] = {}
+    for name, config in manifest["repositories"].items():
+        fetched = (Path(source_root) / name).resolve() if source_root else None
+        paths[name] = (
+            fetched
+            if fetched is not None and fetched.is_dir()
+            else (manifest_path.parent / config["path"]).resolve()
+        )
+    return paths
+
+
 def _index_page(site: dict[str, Any], records: list[dict[str, str]]) -> str:
     rows = []
     for record in records:
@@ -149,15 +163,7 @@ def build(
     manifest_path = manifest_path.resolve()
     manifest = load_manifest(manifest_path)
     as_of = as_of or dt.date.today()
-    source_root = os.environ.get("POLICY_NEXUS_SOURCE_ROOT")
-    repository_paths = {}
-    for name, config in manifest["repositories"].items():
-        fetched = (Path(source_root) / name).resolve() if source_root else None
-        repository_paths[name] = (
-            fetched
-            if fetched is not None and fetched.is_dir()
-            else (manifest_path.parent / config["path"]).resolve()
-        )
+    resolved_repositories = repository_paths(manifest_path, manifest)
     output_parent = output.resolve().parent
     output_parent.mkdir(parents=True, exist_ok=True)
     temporary = Path(tempfile.mkdtemp(prefix=f".{output.name}-", dir=output_parent))
@@ -167,7 +173,7 @@ def build(
     records: list[dict[str, str]] = []
     try:
         for document in manifest["documents"]:
-            repo = repository_paths[document["source_repo"]]
+            repo = resolved_repositories[document["source_repo"]]
             source = (repo / document["source_path"]).resolve()
             if not source.is_file() or repo not in source.parents:
                 raise FileNotFoundError(f"canonical source unavailable: {source}")
diff --git a/tools/check_currency.py b/tools/check_currency.py
index c7d1102..a4b20e8 100644
--- a/tools/check_currency.py
+++ b/tools/check_currency.py
@@ -5,7 +5,7 @@ import argparse
 import datetime as dt
 from pathlib import Path
 
-from build_site import _add_interval, load_manifest
+from build_site import _add_interval, load_manifest, repository_paths
 from render import split_frontmatter
 
 
@@ -16,9 +16,10 @@ def main() -> int:
     args = parser.parse_args()
     manifest_path = args.manifest.resolve()
     manifest = load_manifest(manifest_path)
+    repositories = repository_paths(manifest_path, manifest)
     stale = 0
     for document in manifest["documents"]:
-        repo = manifest_path.parent / manifest["repositories"][document["source_repo"]]["path"]
+        repo = repositories[document["source_repo"]]
         source = (repo / document["source_path"]).resolve()
         meta, _markdown = split_frontmatter(source.read_text(encoding="utf-8"))
         reviewed = meta.get("last_reviewed") or meta.get("updated")