gnu: Add rust-dirs-sys-0.4.

* gnu/packages/crates-io.scm (rust-dirs-sys-0.4): New variable.
(rust-dirs-sys-0.3): Inherit from rust-dirs-sys-0.4.

gnu/packages/crates-io.scm

@@ -19249,8 +19249,35 @@ other data.")
     (home-page "https://github.com/xdg-rs/dirs")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-dirs-sys-0.4
+  (package
+    (name "rust-dirs-sys")
+    (version "0.4.1")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "dirs-sys" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "071jy0pvaad9lsa6mzawxrh7cmr7hsmsdxwzm7jzldfkrfjha3sj"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-libc" ,rust-libc-0.2)
+        ("rust-option-ext" ,rust-option-ext-0.2)
+        ("rust-redox-users" ,rust-redox-users-0.4)
+        ("rust-windows-sys" ,rust-windows-sys-0.48))))
+    (home-page "https://github.com/dirs-dev/dirs-sys-rs")
+    (synopsis
+     "System-level helper functions for the dirs and directories crates")
+    (description
+     "This package provides system-level helper functions for the @code{dirs}
+and @code{directories} crates.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-dirs-sys-0.3
   (package
+    (inherit rust-dirs-sys-0.4)
     (name "rust-dirs-sys")
     (version "0.3.6")
     (source
@@ -19261,7 +19288,6 @@ other data.")
         (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "102pbpcrfhvhfyfnyvmvvwpl6mfvynh170f6ima6fyinxls6bn03"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:cargo-inputs
        (("rust-libc" ,rust-libc-0.2)
@@ -19269,14 +19295,7 @@ other data.")
         ("rust-winapi" ,rust-winapi-0.3))))
     (inputs
      (list rust-cfg-if-0.1 rust-libc-0.2 rust-redox-users-0.3
-           rust-winapi-0.3))
-    (home-page "https://github.com/soc/dirs-sys-rs")
-    (synopsis
-     "System-level helper functions for the dirs and directories crates")
-    (description
-     "This package provides system-level helper functions for the @code{dirs}
-and @code{directories} crates.")
-    (license (list license:asl2.0 license:expat))))
+           rust-winapi-0.3))))
 
 (define-public rust-dirs-sys-next-0.1
   (package