diff --git a/.gitignore b/.gitignore
index a50afbe..b9d1b18 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,4 @@
 /libc-0.2.78.crate
 /libc-0.2.79.crate
 /libc-0.2.80.crate
+/libc-0.2.81.crate
diff --git a/.rust2rpm.conf b/.rust2rpm.conf
index 7bbe884..5a099e0 100644
--- a/.rust2rpm.conf
+++ b/.rust2rpm.conf
@@ -1,4 +1,8 @@
 [DEFAULT]
+unwanted-features =
+  const-extern-fn
+  rustc-dep-of-std
+  rustc-std-workspace-core
 buildrequires =
   glibc-devel
 lib.requires =
diff --git a/libc-fix-metadata.diff b/libc-fix-metadata.diff
deleted file mode 100644
index 11e2fb7..0000000
--- a/libc-fix-metadata.diff
+++ /dev/null
@@ -1,19 +0,0 @@
---- libc-0.2.80/Cargo.toml	2020-10-25T20:52:21+00:00
-+++ libc-0.2.80/Cargo.toml	2020-11-04T20:03:44.950947+00:00
-@@ -24,16 +24,11 @@
- categories = ["external-ffi-bindings", "no-std", "os"]
- license = "MIT OR Apache-2.0"
- repository = "https://github.com/rust-lang/libc"
--[dependencies.rustc-std-workspace-core]
--version = "1.0.0"
--optional = true
- 
- [features]
- align = []
--const-extern-fn = []
- default = ["std"]
- extra_traits = []
--rustc-dep-of-std = ["align", "rustc-std-workspace-core"]
- std = []
- use_std = ["std"]
- [badges.azure-devops]
diff --git a/rust-libc.spec b/rust-libc.spec
index abd5926..78ebc24 100644
--- a/rust-libc.spec
+++ b/rust-libc.spec
@@ -1,22 +1,18 @@
-# Generated by rust2rpm 15
+# Generated by rust2rpm 16
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate libc
 
 Name:           rust-%{crate}
-Version:        0.2.80
-Release:        2%{?dist}
+Version:        0.2.81
+Release:        1%{?dist}
 Summary:        Raw FFI bindings to platform libraries like libc
 
 # Upstream license specification: MIT OR Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/libc
 Source:         %{crates_source}
-# Initial patched metadata
-# * drop dependencies on compiler internals (rustc-std-workspace-core)
-# * drop nightly-only "const-extern-fn" feature
-Patch0:         libc-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}
 %if %{__cargo_skip_build}
@@ -24,6 +20,7 @@ BuildArch:      noarch
 %endif
 
 BuildRequires:  rust-packaging
+BuildRequires:  glibc-devel
 
 %global _description %{expand:
 Raw FFI bindings to platform libraries like libc.}
@@ -111,7 +108,6 @@ which use "use_std" feature of "%{crate}" crate.
 
 %generate_buildrequires
 %cargo_generate_buildrequires
-echo 'glibc-devel'
 
 %build
 %cargo_build
@@ -125,6 +121,10 @@ echo 'glibc-devel'
 %endif
 
 %changelog
+* Mon Dec 07 2020 Fabio Valentini <decathorpe@gmail.com> - 0.2.81-1
+- Update to version 0.2.81.
+- Fixes RHBZ#1904841
+
 * Wed Nov 11 2020 Fabio Valentini <decathorpe@gmail.com> - 0.2.80-2
 - Reintroduce accidentally removed "align" feature.
 
diff --git a/sources b/sources
index a1f0c2b..8c2a81e 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libc-0.2.80.crate) = 69b2f4c67d29bd4fc8f6d0388036ac3ea0de2ba7387f56f4e4bd035696ba313fdce10d18107ef83490f574d6fff796b305d5f2c2bb03a7cf33b9136386e65b8c
+SHA512 (libc-0.2.81.crate) = 8e121e0dcbd8218e02c2c6536ef6398cd002a92406d433c39bf84576e9b881c5b8a66fee826da6a6189f44b825f3a9d959075eeb0501d7f604bf9cc1a8b8d437