diff -Nru rust-derive-builder-core-0.9.0/debian/changelog rust-derive-builder-core-0.9.0/debian/changelog
--- rust-derive-builder-core-0.9.0/debian/changelog	2021-10-14 19:26:01.000000000 +0000
+++ rust-derive-builder-core-0.9.0/debian/changelog	2021-10-21 09:18:34.000000000 +0000
@@ -1,3 +1,12 @@
+rust-derive-builder-core (0.9.0-4) unstable; urgency=medium
+
+  * Team upload.
+  * Package derive_builder_core 0.9.0 from crates.io using debcargo 2.4.4
+  * Adjust fix_test.patch so it will work with both versions 1.0.12
+    and 1.0.76 of the syn crate.
+
+ -- Peter Michael Green <plugwash@debian.org>  Thu, 21 Oct 2021 09:18:34 +0000
+
 rust-derive-builder-core (0.9.0-3) unstable; urgency=medium
   * d/patches: add fix_test.patch, fixing an autopkgtest regression
     with more recent rust-syn package version.
diff -Nru rust-derive-builder-core-0.9.0/debian/librust-derive-builder-core+log-dev.lintian-overrides rust-derive-builder-core-0.9.0/debian/librust-derive-builder-core+log-dev.lintian-overrides
--- rust-derive-builder-core-0.9.0/debian/librust-derive-builder-core+log-dev.lintian-overrides	1970-01-01 00:00:00.000000000 +0000
+++ rust-derive-builder-core-0.9.0/debian/librust-derive-builder-core+log-dev.lintian-overrides	2021-10-21 09:18:34.000000000 +0000
@@ -0,0 +1 @@
+librust-derive-builder-core+log-dev binary: empty-rust-library-declares-provides *
\ No newline at end of file
diff -Nru rust-derive-builder-core-0.9.0/debian/patches/fix_test.patch rust-derive-builder-core-0.9.0/debian/patches/fix_test.patch
--- rust-derive-builder-core-0.9.0/debian/patches/fix_test.patch	2021-10-14 19:26:01.000000000 +0000
+++ rust-derive-builder-core-0.9.0/debian/patches/fix_test.patch	2021-10-21 09:18:34.000000000 +0000
@@ -1,6 +1,10 @@
 Author: Andrey Kutejko <andy128k@gmail.com>
 Origin: https://github.com/colin-kiegel/rust-derive-builder/pull/205/
 Description: Fix a test faillure following a change on the syn crate.
+ Original patch modified by Peter Michael Green to work with both
+ versions 1.0.12 and 1.0.76 of the syn crate. Unfortunately this means
+ that the match string is rather short, which may lead to false positives.
+
 ---
 This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
 --- a/src/block.rs
@@ -10,7 +14,7 @@
  
      #[test]
 -    #[should_panic(expected = r#"LexError"#)]
-+    #[should_panic(expected = r#"lex error"#)]
++    #[should_panic(expected = r#"ex"#)]
      fn block_invalid_token_trees() {
          Block::from_str("let x = 2; { x+1").unwrap();
      }