diff --git a/.gitignore b/.gitignore
index 1204462..912bd32 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 /enum-as-inner-0.3.1.crate
 /enum-as-inner-0.3.2.crate
 /enum-as-inner-0.3.3.crate
+/enum-as-inner-0.4.0.crate
diff --git a/rust-enum-as-inner.spec b/rust-enum-as-inner.spec
index b15acc6..137a647 100644
--- a/rust-enum-as-inner.spec
+++ b/rust-enum-as-inner.spec
@@ -1,11 +1,11 @@
-# Generated by rust2rpm 13
+# Generated by rust2rpm 21
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate enum-as-inner
 
 Name:           rust-%{crate}
-Version:        0.3.3
+Version:        0.4.0
 Release:        %autorelease
 Summary:        Proc-macro for deriving inner field accessor functions on enums
 
@@ -15,11 +15,8 @@ URL:            https://crates.io/crates/enum-as-inner
 Source:         %{crates_source}
 
 ExclusiveArch:  %{rust_arches}
-%if %{__cargo_skip_build}
-BuildArch:      noarch
-%endif
 
-BuildRequires:  rust-packaging
+BuildRequires:  rust-packaging >= 21
 
 %global _description %{expand:
 Proc-macro for deriving inner field accessor functions on enums.}
@@ -32,13 +29,17 @@ BuildArch:      noarch
 
 %description    devel %{_description}
 
-This package contains library source intended for building other packages
-which use "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "%{crate}" crate.
 
 %files          devel
-%license LICENSE-MIT LICENSE-APACHE copyright.txt
-%doc README.md
-%{cargo_registry}/%{crate}-%{version_no_tilde}/
+%license %{crate_instdir}/LICENSE-APACHE
+%license %{crate_instdir}/LICENSE-MIT
+%license %{crate_instdir}/copyright.txt
+%doc %{crate_instdir}/CHANGELOG.md
+%doc %{crate_instdir}/CODE_OF_CONDUCT.md
+%doc %{crate_instdir}/README.md
+%{crate_instdir}/
 
 %package     -n %{name}+default-devel
 Summary:        %{summary}
@@ -46,11 +47,11 @@ BuildArch:      noarch
 
 %description -n %{name}+default-devel %{_description}
 
-This package contains library source intended for building other packages
-which use "default" feature of "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "default" feature of the "%{crate}" crate.
 
 %files       -n %{name}+default-devel
-%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+%ghost %{crate_instdir}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
diff --git a/sources b/sources
index 901e730..a0b0ad1 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (enum-as-inner-0.3.3.crate) = 83bc21cc6c995227ff569c38d2f734b54000683cd39211f9010becd7a8fa470955936ce5c317718f9ac5742294e7362c5fc97dc68afec42560a8c332caa50df2
+SHA512 (enum-as-inner-0.4.0.crate) = d20bc869eb562b614678ea3cc9bbb22d189f42c91d697068ac8aef35e68125175ff6d3307dee46eb45edda8ba97fa88599a3d573ee2f0d8037355c10566adbdf