gnu: Add rust-nix-0.27.

* gnu/packages/crates-io.scm (rust-nix-0.27): New variable.
(rust-nix-0.26): Inherit from rust-nix-0.27.

Change-Id: I0c718a9a6116f0b93414da5f922c18e9f6946d10
Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -48144,8 +48144,45 @@ nitrokey crate and others using it.")
 nitrokey-test crate.")
     (license license:gpl3+)))
 
+(define-public rust-nix-0.27
+  (package
+    (name "rust-nix")
+    (version "0.27.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "nix" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "0ly0kkmij5f0sqz35lx9czlbk6zpihb7yh1bsy4irzwfd2f4xc1f"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:tests? #f      ; unresolved import `nix::sys::aio`
+       #:cargo-inputs
+       (("rust-bitflags" ,rust-bitflags-2)
+        ("rust-cfg-if" ,rust-cfg-if-1)
+        ("rust-libc" ,rust-libc-0.2)
+        ("rust-memoffset" ,rust-memoffset-0.9)
+        ("rust-pin-utils" ,rust-pin-utils-0.1))
+       #:cargo-development-inputs
+       (("rust-assert-impl" ,rust-assert-impl-0.1)
+        ("rust-caps" ,rust-caps-0.5)
+        ("rust-parking-lot" ,rust-parking-lot-0.12)
+        ("rust-rand" ,rust-rand-0.8)
+        ("rust-semver" ,rust-semver-1)
+        ("rust-sysctl" ,rust-sysctl-0.4)
+        ("rust-tempfile" ,rust-tempfile-3))))
+    (home-page "https://github.com/nix-rust/nix")
+    (synopsis "Rust friendly bindings to *nix APIs")
+    (description
+     "Nix seeks to provide friendly bindings to various *nix platform APIs.
+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-0.26
   (package
+    (inherit rust-nix-0.27)
     (name "rust-nix")
     (version "0.26.2")
     (source
@@ -48155,7 +48192,6 @@ nitrokey-test crate.")
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "06lfvjhsj5zlslsg2jhijrm69npprmsh7r1667qnl7c2jv8s7pdz"))))
-    (build-system cargo-build-system)
     (arguments
      (list #:skip-build? #t
            #:cargo-inputs
@@ -48164,14 +48200,7 @@ nitrokey-test crate.")
              ("rust-libc" ,rust-libc-0.2)
              ("rust-memoffset" ,rust-memoffset-0.7)
              ("rust-pin-utils" ,rust-pin-utils-0.1)
-             ("rust-static-assertions" ,rust-static-assertions-1))))
+             ("rust-static-assertions" ,rust-static-assertions-1))))))
-    (home-page "https://github.com/nix-rust/nix")
-    (synopsis "Rust friendly bindings to *nix APIs")
-    (description
-     "Nix seeks to provide friendly bindings to various *nix platform APIs.
-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-0.25
   (package