diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index c1db24389b..0d6c2580ab 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -42429,29 +42429,6 @@ in your code.")
     (description "Attribute macro for proc-macro-error crate")
     (license (list license:expat license:asl2.0))))
 
-(define-public rust-proc-macro-error-attr-0.4
-  (package
-    (inherit rust-proc-macro-error-attr-1)
-    (name "rust-proc-macro-error-attr")
-    (version "0.4.12")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "proc-macro-error-attr" version))
-       (file-name
-        (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "1pk9mwcfnpf8favgc2cl4sqlmi818p96hg8pfb51wg5nzmvlnnwa"))))
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-syn-mid" ,rust-syn-mid-0.5)
-        ("rust-version-check" ,rust-version-check-0.9)
-        ("rust-proc-macro2" ,rust-proc-macro2-1)
-        ("rust-syn" ,rust-syn-1)
-        ("rust-quote" ,rust-quote-1))))))
-
 (define-public rust-proc-macro-hack-0.5
   (package
     (name "rust-proc-macro-hack")