diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 7fd60bce61..9a9defd390 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -11289,26 +11289,6 @@ automatically on cargo test.")
 optional dependency graph analysis.")
     (license (list license:asl2.0 license:expat))))
 
-(define-public rust-cargo-lock-9
-  (package
-    (inherit rust-cargo-lock-10)
-    (name "rust-cargo-lock")
-    (version "9.0.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "cargo-lock" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "0wmczs13psr8p9mc51w4r4pm900dbpbpipp87knlkd7gg19nf771"))))
-    (arguments
-     `(#:cargo-inputs (("rust-gumdrop" ,rust-gumdrop-0.8)
-                       ("rust-petgraph" ,rust-petgraph-0.6)
-                       ("rust-semver" ,rust-semver-1)
-                       ("rust-serde" ,rust-serde-1)
-                       ("rust-toml" ,rust-toml-0.7)
-                       ("rust-url" ,rust-url-2))))))
-
 (define-public rust-cargo-manifest-0.13
   (package
     (name "rust-cargo-manifest")