diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 31a582507e..3ac7f2ce1f 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -71961,32 +71961,6 @@ a readable output format.")
     (description "This package provides a simple logger for the log facade.")
     (license license:bsd-3)))
 
-(define-public rust-simple-mutex-1
-  (package
-    (name "rust-simple-mutex")
-    (version "1.1.5")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "simple-mutex" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "1mnwlgjajqmxjfgsdcr9imf23yg1zblny95zrvcflvbgzbmbpaiq"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:cargo-inputs
-       (("rust-event-listener" ,rust-event-listener-2))
-       #:cargo-development-inputs
-       (("rust-parking-lot" ,rust-parking-lot-0.10))))
-    (home-page "https://github.com/stjepang/simple-mutex")
-    (synopsis
-     "Mutex more efficient than @code{std} and simpler than
-@code{parking_lot}")
-    (description
-     "This package provides a mutex more efficient than @code{std} and
-simpler than @code{parking_lot}.")
-    (license (list license:asl2.0 license:expat))))
-
 (define-public rust-simplelog-0.12
   (package
     (name "rust-simplelog")