Refine VCS URL install error message wording in Transaction.add_requirement

CHANGELOG.md

@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `install` now raises a helpful `ValueError` when given a VCS URL
   (`git+`, `hg+`, `svn+`, `bzr+`) instead of an opaque parser error,
   explaining that micropip only installs prebuilt wheels.
-  [#77](https://github.com/pyodide/micropip/issues/77)
+  [#277](https://github.com/pyodide/micropip/pull/277)
 
 ## [0.11.1] - 2026/04/02
 

micropip/transaction.py

@@ -87,8 +87,8 @@ async def add_requirement(self, req: str | Requirement) -> None:
             raise ValueError(
                 f"Cannot install {req!r}: micropip only installs prebuilt wheels "
                 "and does not support installing from a VCS URL "
-                "(git+, hg+, svn+, bzr+). Provide a wheel URL or a package name "
-                "available on a configured index."
+                "(git+, hg+, svn+, bzr+). Provide a URL pointing to a wheel "
+                "or a package name available on a configured index."
             )
 
         try:

tests/test_transaction.py

@@ -169,8 +169,12 @@ async def test_add_requirement_vcs_url_helpful_error(url, host_compat_layer):
     from micropip.transaction import Transaction
 
     transaction = create_transaction(Transaction, host_compat_layer)
-    with pytest.raises(ValueError, match="does not support installing from a VCS URL"):
+    with pytest.raises(ValueError) as exc_info:
         await transaction.add_requirement(url)
+    assert (
+        "Provide a URL pointing to a wheel or a package name available on a configured index."
+        in str(exc_info.value)
+    )
 
 
 def _pypi_metadata(package, versions_to_tags):