diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 12e2a02857..0413ab44c4 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -39410,27 +39410,6 @@ functions, and macros.")
        (("rust-permutohedron" ,rust-permutohedron-0.2)
         ("rust-quickcheck" ,rust-quickcheck-0.5))))))
 
-(define-public rust-itertools-0.6
-  (package
-    (inherit rust-itertools-0.10)
-    (name "rust-itertools")
-    (version "0.6.5")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "itertools" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "08fx60wxmjakssqn3w9045dasqvaf1gmgzg5kag062k9l56vxwnk"))))
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-either" ,rust-either-1))
-       #:cargo-development-inputs
-       (("rust-permutohedron" ,rust-permutohedron-0.2)
-        ("rust-quickcheck" ,rust-quickcheck-0.4))))))
-
 (define-public rust-itertools-0.5
   (package
     (inherit rust-itertools-0.7)