diff --git a/.gitignore b/.gitignore
index 6c1e99a..a6b909e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@
 /lock_api-0.4.3.crate
 /lock_api-0.4.4.crate
 /lock_api-0.4.5.crate
+/lock_api-0.4.6.crate
diff --git a/.rust2rpm.conf b/.rust2rpm.conf
deleted file mode 100644
index 1715b93..0000000
--- a/.rust2rpm.conf
+++ /dev/null
@@ -1,3 +0,0 @@
-[DEFAULT]
-unwanted-features =
-  nightly
diff --git a/rust-lock_api.spec b/rust-lock_api.spec
index 29770d3..657f089 100644
--- a/rust-lock_api.spec
+++ b/rust-lock_api.spec
@@ -1,11 +1,11 @@
-# Generated by rust2rpm 18
+# Generated by rust2rpm 21
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate lock_api
 
 Name:           rust-%{crate}
-Version:        0.4.5
+Version:        0.4.6
 Release:        %autorelease
 Summary:        Wrappers to create fully-featured Mutex and RwLock types
 
@@ -15,11 +15,8 @@ URL:            https://crates.io/crates/lock_api
 Source:         %{crates_source}
 
 ExclusiveArch:  %{rust_arches}
-%if %{__cargo_skip_build}
-BuildArch:      noarch
-%endif
 
-BuildRequires:  rust-packaging
+BuildRequires:  rust-packaging >= 21
 
 %global _description %{expand:
 Wrappers to create fully-featured Mutex and RwLock types. Compatible with
@@ -33,12 +30,13 @@ 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-APACHE LICENSE-MIT
-%{cargo_registry}/%{crate}-%{version_no_tilde}/
+%license %{crate_instdir}/LICENSE-APACHE
+%license %{crate_instdir}/LICENSE-MIT
+%{crate_instdir}/
 
 %package     -n %{name}+default-devel
 Summary:        %{summary}
@@ -46,11 +44,11 @@ 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
 
 %package     -n %{name}+arc_lock-devel
 Summary:        %{summary}
@@ -58,11 +56,23 @@ BuildArch:      noarch
 
 %description -n %{name}+arc_lock-devel %{_description}
 
-This package contains library source intended for building other packages
-which use "arc_lock" feature of "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "arc_lock" feature of the "%{crate}" crate.
 
 %files       -n %{name}+arc_lock-devel
-%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+%ghost %{crate_instdir}/Cargo.toml
+
+%package     -n %{name}+nightly-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+nightly-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "nightly" feature of the "%{crate}" crate.
+
+%files       -n %{name}+nightly-devel
+%ghost %{crate_instdir}/Cargo.toml
 
 %package     -n %{name}+owning_ref-devel
 Summary:        %{summary}
@@ -70,11 +80,11 @@ BuildArch:      noarch
 
 %description -n %{name}+owning_ref-devel %{_description}
 
-This package contains library source intended for building other packages
-which use "owning_ref" feature of "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "owning_ref" feature of the "%{crate}" crate.
 
 %files       -n %{name}+owning_ref-devel
-%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+%ghost %{crate_instdir}/Cargo.toml
 
 %package     -n %{name}+serde-devel
 Summary:        %{summary}
@@ -82,11 +92,11 @@ BuildArch:      noarch
 
 %description -n %{name}+serde-devel %{_description}
 
-This package contains library source intended for building other packages
-which use "serde" feature of "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "serde" feature of the "%{crate}" crate.
 
 %files       -n %{name}+serde-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 93263cb..abc1c9a 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (lock_api-0.4.5.crate) = d6cd948a4183a73e8b91b9167d551e72dd75820c76123fb0839f8389c7872d2c46dbcf5785d7600ecc4e27f3d214f476585b9c39e85f70500eb8d012e5ff9535
+SHA512 (lock_api-0.4.6.crate) = ba14d341564eba91bb5ec58bb2e0d6c87e70b3694c4609396f0c0f4afc0c6c105a88cb99c303b1e9761b0fc6cae56f79ba6a7663b063454ab1ede4d49274906d