diff --git a/pkgs/build-support/rust/fetch-cargo-vendor-util.py b/pkgs/build-support/rust/fetch-cargo-vendor-util.py
index 5dc789c93ad9..825f07b175ee 100644
--- a/pkgs/build-support/rust/fetch-cargo-vendor-util.py
+++ b/pkgs/build-support/rust/fetch-cargo-vendor-util.py
@@ -292,6 +292,7 @@ def create_vendor(vendor_staging_dir: Path, out_dir: Path) -> None:
     lockfile_version = get_lockfile_version(cargo_lock_toml)
 
     source_to_ind: dict[str, str] = {}
+    selector_to_ind: dict[tuple, str] = {}
     source_config = {}
     next_registry_ind = 0
     next_git_ind = 0
@@ -327,24 +328,35 @@ def create_vendor(vendor_staging_dir: Path, out_dir: Path) -> None:
             continue
 
         if source.startswith("git+"):
-            ind = f"git-{next_git_ind}"
-            next_git_ind += 1
             source_info = parse_git_source(source, lockfile_version)
             selector = make_git_source_selector(source_info)
+            selector_key = (source_info["url"], source_info["type"], source_info["value"])
+            if selector_key in selector_to_ind:
+                ind = selector_to_ind[selector_key]
+            else:
+                ind = f"git-{next_git_ind}"
+                next_git_ind += 1
+                selector_to_ind[selector_key] = ind
+                add_source_replacement(
+                    orig_key=f"original-source-{ind}",
+                    orig_selector=selector,
+                    vendored_key=f"vendored-source-{ind}",
+                    vendored_dir=f"@vendor@/source-{ind}"
+                )
         elif source.startswith("registry+") or source.startswith("sparse+"):
             ind = f"registry-{next_registry_ind}"
             next_registry_ind += 1
             selector = make_registry_source_selector(source)
+            add_source_replacement(
+                orig_key=f"original-source-{ind}",
+                orig_selector=selector,
+                vendored_key=f"vendored-source-{ind}",
+                vendored_dir=f"@vendor@/source-{ind}"
+            )
         else:
             raise Exception(f"Can't process source: {source}.")
 
         source_to_ind[source] = ind
-        add_source_replacement(
-            orig_key=f"original-source-{ind}",
-            orig_selector=selector,
-            vendored_key=f"vendored-source-{ind}",
-            vendored_dir=f"@vendor@/source-{ind}"
-        )
 
     config_path = out_dir / ".cargo" / "config.toml"
     config_path.parent.mkdir()