diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1ba1e82..56e507a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -77,8 +77,13 @@ jobs:
         # Make Bash log commands and not silently ignore errors.
         set -euxo pipefail
 
-        # Install the appropriate version of Rust.
-        rustup toolchain install 1.78.0 # [ref:rust_1.78.0]
+        # Install the appropriate version of Rust. The `--no-self-update` is necessary to make this
+        # command work reliably on Windows. Without that flag, the command fails occasionally. See
+        #
+        #   https://github.com/rust-lang/rustup/issues/2415#issuecomment-658752121
+        #
+        # for more information.
+        rustup toolchain install 1.78.0 --no-self-update # [ref:rust_1.78.0]
         rustup default 1.78.0 # [ref:rust_1.78.0]
 
         # Add the targets.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 35717eb..e04847c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 # Contributing
 
-Thank you for your interest in contributing! You can contribute by filing [issues](https://github.com/stepchowfun/tagref/issues) and submitting [pull requests](https://github.com/stepchowfun/tagref/pulls). Please observe our [code of conduct](https://github.com/stepchowfun/tagref/blob/main/CODE_OF_CONDUCT.md).
+Thank you for your interest in contributing! You can contribute by filing [issues](https://github.com/stepchowfun/tagref/issues) and submitting [pull requests](https://github.com/stepchowfun/tagref/pulls). Please observe our [code of conduct](https://github.com/stepchowfun/tagref/blob/main/CODE_OF_CONDUCT.md)<!-- [file:CODE_OF_CONDUCT.md] -->.
 
 If you submit a pull request, please ensure your change passes the [GitHub Actions](https://github.com/stepchowfun/tagref/actions) CI checks. This will be apparent from the required status check(s) in the pull request.