gnu: Add rust-pyproject-toml-0.6.

* gnu/packages/crates-io.scm (rust-pyproject-toml-0.6): New variable.

gnu/packages/crates-io.scm

@@ -49623,6 +49623,30 @@ Python code from a Rust binary is also supported.")
         ("rust-serde-json" ,rust-serde-json-1)
         ("rust-trybuild" ,rust-trybuild-1))))))
 
+(define-public rust-pyproject-toml-0.6
+  (package
+    (name "rust-pyproject-toml")
+    (version "0.6.1")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "pyproject-toml" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0pywp6ml15jlv9yxfjcvrs3fgd3xnq8fc6a2wcbw9q9iknmgwygf"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-indexmap" ,rust-indexmap-1)
+        ("rust-pep440-rs" ,rust-pep440-rs-0.3)
+        ("rust-pep508-rs" ,rust-pep508-rs-0.2)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-toml" ,rust-toml-0.7))))
+    (home-page "https://github.com/PyO3/pyproject-toml-rs.git")
+    (synopsis "pyproject.toml parser in Rust")
+    (description "This package provides a pyproject.toml parser in Rust.")
+    (license license:expat)))
+
 (define-public rust-python3-dll-a-0.2
   (package
     (name "rust-python3-dll-a")