gnu: Add rust-nix-0.22.

* gnu/packages/crates-io.scm (rust-nix-0.22): New variable.
(rust-nix-0.21): Inherit from above.

gnu/packages/crates-io.scm

@@ -28386,17 +28386,17 @@ nitrokey crate and others using it.")
 nitrokey-test crate.")
     (license license:gpl3+)))
 
-(define-public rust-nix-0.21
+(define-public rust-nix-0.22
   (package
     (name "rust-nix")
-    (version "0.21.0")
+    (version "0.22.1")
     (source
      (origin
        (method url-fetch)
        (uri (crate-uri "nix" version))
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
-        (base32 "1isfgr239sxvkcjhcp08rz2nqi4s6w5ik2l2m183ldlxqkz2hdsw"))))
+        (base32 "0cahgzxhdwsaa8491n6cn8gadgfsxk5razyfw4xr3k34f5n5smg7"))))
     (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t
@@ -28414,6 +28414,27 @@ The goal is to not provide a 100% unified interface, but to unify what can be
 while still providing platform specific APIs.")
     (license license:expat)))
 
+(define-public rust-nix-0.21
+  (package
+    (inherit rust-nix-0.22)
+    (name "rust-nix")
+    (version "0.21.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "nix" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1isfgr239sxvkcjhcp08rz2nqi4s6w5ik2l2m183ldlxqkz2hdsw"))))
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-bitflags" ,rust-bitflags-1)
+        ("rust-cc" ,rust-cc-1)
+        ("rust-cfg-if" ,rust-cfg-if-1)
+        ("rust-libc" ,rust-libc-0.2)
+        ("rust-memoffset" ,rust-memoffset-0.6))))))
+
 (define-public rust-nix-0.20
   (package
     (inherit rust-nix-0.21)