diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a49987d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/results_*/
+/*.src.rpm
+
+/crypto-bigint-0.2.11.crate
diff --git a/README.md b/README.md
deleted file mode 100644
index f2f23be..0000000
--- a/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# rust-crypto-bigint
-
-The rust-crypto-bigint package
diff --git a/crypto-bigint-fix-metadata.diff b/crypto-bigint-fix-metadata.diff
new file mode 100644
index 0000000..458ee01
--- /dev/null
+++ b/crypto-bigint-fix-metadata.diff
@@ -0,0 +1,21 @@
+--- crypto-bigint-0.2.11/Cargo.toml	1970-01-01T00:00:01+00:00
++++ crypto-bigint-0.2.11/Cargo.toml	2021-12-10T16:22:13.642298+00:00
+@@ -32,17 +32,12 @@
+ version = "0.6"
+ optional = true
+ 
+-[dependencies.rlp]
+-version = "0.5"
+-optional = true
+-default-features = false
+-
+ [dependencies.subtle]
+ version = "2.4"
+ default-features = false
+ 
+ [dependencies.zeroize]
+-version = ">=1, <1.5"
++version = "1"
+ optional = true
+ default-features = false
+ [dev-dependencies.hex-literal]
diff --git a/rust-crypto-bigint.spec b/rust-crypto-bigint.spec
new file mode 100644
index 0000000..ec1a7d4
--- /dev/null
+++ b/rust-crypto-bigint.spec
@@ -0,0 +1,137 @@
+# Generated by rust2rpm 20
+%bcond_without check
+%global debug_package %{nil}
+
+%global crate crypto-bigint
+
+Name:           rust-%{crate}
+Version:        0.2.11
+Release:        %autorelease
+Summary:        Pure Rust bigint implementation for use in cryptographic applications
+
+# Upstream license specification: Apache-2.0 OR MIT
+License:        ASL 2.0 or MIT
+URL:            https://crates.io/crates/crypto-bigint
+Source:         %{crates_source}
+# Initial patched metadata
+# * drop optional rlp dependency (not packaged yet)
+# * relax zeroize dependency
+Patch0:         crypto-bigint-fix-metadata.diff
+
+ExclusiveArch:  %{rust_arches}
+
+BuildRequires:  rust-packaging
+
+%global _description %{expand:
+Pure Rust implementation of a big integer library which has been designed from
+the ground-up for use in cryptographic applications. Provides constant-time,
+no_std-friendly implementations of modern formulas using const generics.}
+
+%description %{_description}
+
+%package        devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description    devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "%{crate}" crate.
+
+%files          devel
+%license LICENSE-APACHE LICENSE-MIT
+%doc CHANGELOG.md README.md
+%{cargo_registry}/%{crate}-%{version_no_tilde}/
+
+%package     -n %{name}+default-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+default-devel %{_description}
+
+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
+
+%package     -n %{name}+alloc-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+alloc-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "alloc" feature of the "%{crate}" crate.
+
+%files       -n %{name}+alloc-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+generic-array-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+generic-array-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "generic-array" feature of the "%{crate}" crate.
+
+%files       -n %{name}+generic-array-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+rand-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+rand-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "rand" feature of the "%{crate}" crate.
+
+%files       -n %{name}+rand-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+rand_core-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+rand_core-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "rand_core" feature of the "%{crate}" crate.
+
+%files       -n %{name}+rand_core-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+zeroize-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+zeroize-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "zeroize" feature of the "%{crate}" crate.
+
+%files       -n %{name}+zeroize-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%prep
+%autosetup -n %{crate}-%{version_no_tilde} -p1
+%cargo_prep
+
+%generate_buildrequires
+%cargo_generate_buildrequires
+
+%build
+%cargo_build
+
+%install
+%cargo_install
+
+%if %{with check}
+%check
+%cargo_test
+%endif
+
+%changelog
+%autochangelog
diff --git a/sources b/sources
new file mode 100644
index 0000000..49a0cc6
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (crypto-bigint-0.2.11.crate) = dbc24bcd0b5192f11c32b687a5e4a3d730a35c953bdfb935487e7e317fe68810e7df10068f913c84e415945b41f31556c5607d53ee54b8bb5b6b00de2a0738c4