diff --git a/.github/workflows/build-binaries.yml b/.github/workflows/build-binaries.yml
index cb5024b811c2..219cbd3b6138 100644
--- a/.github/workflows/build-binaries.yml
+++ b/.github/workflows/build-binaries.yml
@@ -34,8 +34,6 @@ env:
 
 jobs:
   sdist:
-    # TODO(charlie): Enable source distribution builds.
-    if: false
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
diff --git a/crates/pep440-rs/Cargo.toml b/crates/pep440-rs/Cargo.toml
index 87397b5940a2..22ccbdf86fb9 100644
--- a/crates/pep440-rs/Cargo.toml
+++ b/crates/pep440-rs/Cargo.toml
@@ -3,7 +3,7 @@ name = "pep440_rs"
 version = "0.3.12"
 description = "A library for python version numbers and specifiers, implementing PEP 440"
 license = "Apache-2.0 OR BSD-2-Clause"
-include = ["/src", "Changelog.md", "License-Apache", "License-BSD", "README.md", "pyproject.toml"]
+include = ["/src", "Changelog.md", "License-Apache", "License-BSD", "Readme.md", "pyproject.toml"]
 
 edition = { workspace = true }
 rust-version = { workspace = true }
diff --git a/crates/pep440-rs/README.md b/crates/pep440-rs/Readme.md
similarity index 100%
rename from crates/pep440-rs/README.md
rename to crates/pep440-rs/Readme.md