diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..677b60d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/err-derive-0.2.1.crate
diff --git a/0001-Move-to-proc-macro-error-v0.3.4.patch b/0001-Move-to-proc-macro-error-v0.3.4.patch
new file mode 100644
index 0000000..cd6a538
--- /dev/null
+++ b/0001-Move-to-proc-macro-error-v0.3.4.patch
@@ -0,0 +1,241 @@
+diff -up err-derive-0.2.1/build.rs.orig err-derive-0.2.1/build.rs
+--- err-derive-0.2.1/build.rs.orig	2019-10-09 12:21:01.000000000 +0200
++++ err-derive-0.2.1/build.rs	2019-12-06 22:41:25.114969835 +0100
+@@ -1,22 +1,7 @@
+-use rustc_version::version;
+-
+-fn version_ge(minor_min: u64) -> bool {
+-    let version = version().unwrap();
+-
+-    version.major == 1 && version.minor >= minor_min
+-}
++#[rustversion::before(1.32)]
++compile_error!("`err-derive` depends on `skeptic`, which requires rustc >= 1.32");
+ 
+ fn main() {
+-    if !version_ge(32) {
+-        panic!("`err-derive` depends on `quote 1.0`, which requires rustc >= 1.32");
+-    }
+-    generate_doc_tests()
+-}
+-
+-#[cfg(feature = "skeptic")]
+-fn generate_doc_tests() {
++    #[cfg(feature = "skeptic")]
+     skeptic::generate_doc_tests(&["README.md"]);
+ }
+-
+-#[cfg(not(feature = "skeptic"))]
+-fn generate_doc_tests() { }
+diff -up err-derive-0.2.1/Cargo.toml.orig err-derive-0.2.1/Cargo.toml
+--- err-derive-0.2.1/Cargo.toml.orig	2019-12-06 22:41:25.113969837 +0100
++++ err-derive-0.2.1/Cargo.toml	2019-12-06 22:42:14.978892161 +0100
+@@ -40,8 +40,8 @@ version = "1.0.5"
+ version = "0.12.0"
+ [dev-dependencies.skeptic]
+ version = "0.13"
+-[build-dependencies.rustc_version]
+-version = "0.2.3"
++[build-dependencies.rustversion]
++version = "1.0"
+ 
+ [build-dependencies.skeptic]
+ version = "0.13"
+diff -up err-derive-0.2.1/src/lib.rs.orig err-derive-0.2.1/src/lib.rs
+--- err-derive-0.2.1/src/lib.rs.orig	2019-10-09 13:08:03.000000000 +0200
++++ err-derive-0.2.1/src/lib.rs	2019-12-06 22:41:25.115969834 +0100
+@@ -132,21 +132,13 @@ use syn::spanned::Spanned;
+ 
+ extern crate proc_macro_error;
+ 
+-use proc_macro_error::{filter_macro_errors, span_error};
++use proc_macro_error::{abort, proc_macro_error};
+ use syn::Attribute;
+ 
+ decl_derive!([Error, attributes(error, source, cause)] => error_derive);
+ 
++#[proc_macro_error(allow_not_macro, assert_unwind_safe)]
+ fn error_derive(s: synstructure::Structure) -> TokenStream {
+-    // proc_macro_error requires all `quote!` call to be inside the `filter_macro_errors!` macro,
+-    // by using an inner method we satisfy this requirement while still getting proper syntax
+-    // highlighting
+-    filter_macro_errors! {
+-        error_derive_inner(s).into()
+-    }
+-}
+-
+-fn error_derive_inner(s: synstructure::Structure) -> TokenStream2 {
+     let source_body = s.each_variant(|v| {
+         if let Some(source) = v.bindings().iter().find(|binding| {
+             has_attr(&binding.ast().attrs, "source") || has_attr(&binding.ast().attrs, "cause")
+@@ -205,11 +197,7 @@ fn error_derive_inner(s: synstructure::S
+ 
+     let from = from_body(&s);
+ 
+-    quote! {
+-        #error
+-        #display
+-        #from
+-    }
++    quote!(#error #display #from).into()
+ }
+ 
+ fn display_body(s: &synstructure::Structure) -> quote::__rt::TokenStream {
+@@ -217,10 +205,10 @@ fn display_body(s: &synstructure::Struct
+         let span = v.ast().ident.span();
+         let msg = match find_error_msg(&v.ast().attrs) {
+             Some(msg) => msg,
+-            None => span_error!(span, "Variant is missing display attribute."),
++            None => abort!(span, "Variant is missing display attribute."),
+         };
+         if msg.nested.is_empty() {
+-            span_error!(span, "Expected at least one argument to error attribute");
++            abort!(span, "Expected at least one argument to error attribute");
+         }
+ 
+         let format_string = match msg.nested[0] {
+@@ -232,7 +220,7 @@ fn display_body(s: &synstructure::Struct
+             {
+                 nv.lit.clone()
+             }
+-            _ => span_error!(
++            _ => abort!(
+                 msg.nested.span(),
+                 "Error attribute must begin `display = \"\"` to control the Display message."
+             ),
+@@ -241,14 +229,14 @@ fn display_body(s: &synstructure::Struct
+             syn::NestedMeta::Lit(syn::Lit::Int(ref i)) => {
+                 let bi = &v.bindings()[i
+                     .base10_parse::<usize>()
+-                    .unwrap_or_else(|_| span_error!(i.span(), "integer literal overflows usize"))];
++                    .unwrap_or_else(|_| abort!(i.span(), "integer literal overflows usize"))];
+                 quote!(#bi)
+             }
+             syn::NestedMeta::Meta(syn::Meta::Path(ref path)) => {
+                 let id = match path.get_ident() {
+                     Some(id) => id,
+                     // Allows std::u8::MAX (for example)
+-                    None => return quote!(#arg)
++                    None => return quote!(#arg),
+                 };
+                 let id_s = id.to_string();
+                 if id_s.starts_with('_') {
+@@ -256,7 +244,7 @@ fn display_body(s: &synstructure::Struct
+                         let bi = match v.bindings().get(idx) {
+                             Some(bi) => bi,
+                             None => {
+-                                span_error!(
++                                abort!(
+                                     id.span(),
+                                     "display attempted to access field `{}` in `{}::{}` which \
+                                      does not exist (there {} {} field{})",
+@@ -279,10 +267,10 @@ fn display_body(s: &synstructure::Struct
+                 }
+                 // Arg is not a field - might be in global scope
+                 return quote!(#id);
+-            },
++            }
+             // Allows u8::max_value() (for example)
+             syn::NestedMeta::Meta(syn::Meta::List(ref list)) => return quote!(#list),
+-            _ => span_error!(msg.nested.span(), "Invalid argument to error attribute!"),
++            _ => abort!(msg.nested.span(), "Invalid argument to error attribute!"),
+         });
+ 
+         quote! {
+@@ -302,11 +290,11 @@ fn find_error_msg(attrs: &[syn::Attribut
+             {
+                 let span = attr.span();
+                 if error_msg.is_some() {
+-                    span_error!(span, "Cannot have two display attributes")
++                    abort!(span, "Cannot have two display attributes")
+                 } else if let syn::Meta::List(list) = meta {
+                     error_msg = Some(list);
+                 } else {
+-                    span_error!(span, "error attribute must take a list in parentheses")
++                    abort!(span, "error attribute must take a list in parentheses")
+                 }
+             }
+         }
+@@ -324,7 +312,7 @@ fn has_attr(attributes: &[Attribute], at
+                 .map_or(false, |ident| ident == attr_name)
+             {
+                 if found_attr {
+-                    span_error!(attr.span(), "Cannot have two `{}` attributes", attr_name);
++                    abort!(attr.span(), "Cannot have two `{}` attributes", attr_name);
+                 }
+                 found_attr = true;
+             }
+@@ -341,7 +329,7 @@ fn has_attr(attributes: &[Attribute], at
+                                 ident.to_string().split(", ").any(|part| part == attr_name)
+                             }) {
+                                 if found_attr {
+-                                    span_error!(
++                                    abort!(
+                                         path.span(),
+                                         "Cannot have two `{}` attributes",
+                                         attr_name
+@@ -371,7 +359,7 @@ fn from_body(s: &synstructure::Structure
+             let exclude = has_attr(&binding.ast().attrs, "no_from");
+ 
+             if is_source && is_cause {
+-                span_error!(
++                abort!(
+                     span,
+                     "#[error(cause)] is deprecated, use #[error(source)] instead"
+                 )
+@@ -387,7 +375,7 @@ fn from_body(s: &synstructure::Structure
+         }) {
+             if v.bindings().len() > 1 {
+                 if is_explicit {
+-                    span_error!(
++                    abort!(
+                         span,
+                         "Variants containing `from` can only contain a single field"
+                     );
+@@ -402,15 +390,18 @@ fn from_body(s: &synstructure::Structure
+                 .iter()
+                 .any(|existing_from_type| *existing_from_type == from_ident)
+             {
+-                span_error!(
+-                    from_ident.span(),
+-                    "`from` can only be applied for a type once{}",
+-                    if is_explicit {
+-                        ""
+-                    } else {
+-                        ", hint: use #[error(no_from)] to disable automatic From derive"
+-                    }
+-                );
++                if is_explicit {
++                    abort!(
++                        from_ident.span(),
++                        "`from` can only be applied for a type once"
++                    );
++                } else {
++                    abort!(
++                        from_ident.span(),
++                        "`from` can only be applied for a type once";
++                        hint = "use #[error(no_from)] to disable automatic From derive"
++                    );
++                }
+             }
+ 
+             from_types.push(from_ident);
+diff -up err-derive-0.2.1/tests/tests.rs.orig err-derive-0.2.1/tests/tests.rs
+--- err-derive-0.2.1/tests/tests.rs.orig	2019-10-08 21:38:59.000000000 +0200
++++ err-derive-0.2.1/tests/tests.rs	2019-12-06 22:41:25.115969834 +0100
+@@ -125,7 +125,7 @@ pub enum TestsNonFieldDisplayValues {
+     #[error(display = "{}", u8::max_value())]
+     D,
+     #[error(display = "{}", std::u8::MAX)]
+-    E
++    E,
+ }
+ 
+ impl TestsNonFieldDisplayValues {
+@@ -156,4 +156,4 @@ fn non_field_display() {
+ 
+     let s = format!("{}", TestsNonFieldDisplayValues::E);
+     assert_eq!(&s, "255");
+-}
+\ No newline at end of file
++}
diff --git a/err-derive-fix-metadata.diff b/err-derive-fix-metadata.diff
new file mode 100644
index 0000000..2a75e81
--- /dev/null
+++ b/err-derive-fix-metadata.diff
@@ -0,0 +1,11 @@
+--- err-derive-0.2.1/Cargo.toml	1970-01-01T00:00:00+00:00
++++ err-derive-0.2.1/Cargo.toml	2019-12-06T21:22:49.380718+00:00
+@@ -25,7 +25,7 @@
+ [lib]
+ proc-macro = true
+ [dependencies.proc-macro-error]
+-version = "0.2.6"
++version = "0.4"
+ 
+ [dependencies.proc-macro2]
+ version = "1.0.1"
diff --git a/rust-err-derive.spec b/rust-err-derive.spec
new file mode 100644
index 0000000..8b325de
--- /dev/null
+++ b/rust-err-derive.spec
@@ -0,0 +1,104 @@
+# Generated by rust2rpm 12
+%bcond_without check
+%global debug_package %{nil}
+
+%global crate err-derive
+
+Name:           rust-%{crate}
+Version:        0.2.1
+Release:        1%{?dist}
+Summary:        Derive macro for `std::error::Error`
+
+# Upstream license specification: MIT/Apache-2.0
+License:        MIT or ASL 2.0
+URL:            https://crates.io/crates/err-derive
+Source:         %{crates_source}
+# Initial patched metadata
+# - Bump proc-macro-error to 0.4
+Patch0:         err-derive-fix-metadata.diff
+# https://gitlab.com/torkleyy/err-derive/commit/d78cdb827e42b64fc8a820633048ae733ad857de
+Patch1:         0001-Move-to-proc-macro-error-v0.3.4.patch
+
+ExclusiveArch:  %{rust_arches}
+%if %{__cargo_skip_build}
+BuildArch:      noarch
+%endif
+
+BuildRequires:  rust-packaging
+
+%global _description %{expand:
+Derive macro for `std::error::Error`.}
+
+%description %{_description}
+
+%package        devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description    devel %{_description}
+
+This package contains library source intended for building other packages
+which use "%{crate}" crate.
+
+%files          devel
+%license LICENSE LICENSE-APACHE LICENSE-MIT
+%doc 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 "default" feature of "%{crate}" crate.
+
+%files       -n %{name}+default-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+skeptic-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+skeptic-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "skeptic" feature of "%{crate}" crate.
+
+%files       -n %{name}+skeptic-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+std-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+std-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "std" feature of "%{crate}" crate.
+
+%files       -n %{name}+std-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
+* Fri Dec 06 22:22:49 CET 2019 Robert-André Mauchin <zebob.m@gmail.com> - 0.2.1-1
+- Initial package
diff --git a/sources b/sources
new file mode 100644
index 0000000..7f0b313
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (err-derive-0.2.1.crate) = d5aa26b8088272612b78057b89535cf9f032c22e25c86c65cdf872dd57c0f4ca5dbcaf7ea72319833d4487b634160e2d9ffa266cc09d4e00e67f82f68457affd
diff --git a/tests/.fmf/version b/tests/.fmf/version
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/tests/.fmf/version
@@ -0,0 +1 @@
+1
diff --git a/tests/provision.fmf b/tests/provision.fmf
new file mode 100644
index 0000000..503a97c
--- /dev/null
+++ b/tests/provision.fmf
@@ -0,0 +1,5 @@
+---
+standard-inventory-qcow2:
+  qemu:
+    # `cargo test` usually eats more than 1G.
+    m: 4G
diff --git a/tests/tests.yml b/tests/tests.yml
new file mode 100644
index 0000000..695b7d9
--- /dev/null
+++ b/tests/tests.yml
@@ -0,0 +1,13 @@
+---
+- hosts: localhost
+  roles:
+  - role: standard-test-basic
+    tags:
+    - classic
+    repositories:
+    - repo: "https://src.fedoraproject.org/tests/rust.git"
+      dest: rust
+    tests:
+    - rust/cargo-test
+    environment:
+      pkg: rust-err-derive