diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 48b65e1a57..b4948331e7 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -26883,28 +26883,6 @@ their key-value pairs in a user controllable order.")
     (description "This package provides a port of @code{HdrHistogram} to Rust.")
     (license (list license:expat license:asl2.0))))
 
-(define-public rust-hdrhistogram-6
-  (package
-    (inherit rust-hdrhistogram-7)
-    (name "rust-hdrhistogram")
-    (version "6.3.4")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "hdrhistogram" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "17dqk0rp8kimcd8wr542i8cny91fkclw7a2xzszar95wrpmk3lq8"))))
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-base64" ,rust-base64-0.10)
-        ("rust-byteorder" ,rust-byteorder-1)
-        ("rust-crossbeam-channel" ,rust-crossbeam-channel-0.3)
-        ("rust-flate2" ,rust-flate2-1)
-        ("rust-nom" ,rust-nom-4)
-        ("rust-num-traits" ,rust-num-traits-0.2))))))
-
 (define-public rust-headers-0.3
   (package
     (name "rust-headers")