diff --git a/derive_builder-fix-metadata.diff b/derive_builder-fix-metadata.diff
new file mode 100644
index 0000000..555a4b2
--- /dev/null
+++ b/derive_builder-fix-metadata.diff
@@ -0,0 +1,11 @@
+--- derive_builder-0.9.0/Cargo.toml	1970-01-01T00:00:00+00:00
++++ derive_builder-0.9.0/Cargo.toml	2021-02-27T20:28:21.467216+00:00
+@@ -30,7 +30,7 @@
+ optional = true
+ 
+ [dependencies.darling]
+-version = "0.10.2"
++version = "0.12"
+ 
+ [dependencies.derive_builder_core]
+ version = "=0.9.0"
diff --git a/rust-derive_builder.spec b/rust-derive_builder.spec
index 3a136e1..f7f8681 100644
--- a/rust-derive_builder.spec
+++ b/rust-derive_builder.spec
@@ -6,13 +6,17 @@
 
 Name:           rust-%{crate}
 Version:        0.9.0
-Release:        6%{?dist}
+Release:        7%{?dist}
 Summary:        Rust macro to automatically implement the builder pattern for arbitrary structs
 
 # Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/derive_builder
 Source:         %{crates_source}
+# Initial patched metadata
+# * bump to darling 0.12 (already upstream):
+#   https://github.com/colin-kiegel/rust-derive-builder/commit/ee13c51
+Patch0:         derive_builder-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}
 %if %{__cargo_skip_build}
@@ -132,6 +136,9 @@ which use "skeptic_tests" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Sat Feb 27 2021 Fabio Valentini <decathorpe@gmail.com> - 0.9.0-7
+- Bump to darling 0.12.
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.9.0-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild