chromiumDev: Fix build errors due to the older system FFmpeg

The final linking still fails though, even with llvm-git.
We might have to diable use_thin_lto for now:
ld.lld: error: undefined symbol: snappy::Compress(char const*, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*)
>>> referenced by compression_module.cc
>>>               thinlto-cache/Thin-ed5ed5.tmp.o:(reporting::CompressionModule::CompressRecord(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, base::OnceCallback<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, absl::optional<reporting::CompressionInformation>)>) const)
clang-13: error: linker command failed with exit code 1 (use -v to see invocation)

1 files changed, 12 insertions, 0 deletions

diff --git a/pkgs/applications/networking/browsers/chromium/common.nix b/pkgs/applications/networking/browsers/chromium/common.nix
index 18565f31a2fb3..e8664690df290 100644
--- a/pkgs/applications/networking/browsers/chromium/common.nix
+++ b/pkgs/applications/networking/browsers/chromium/common.nix
@@ -175,6 +175,18 @@ let
         sha256 = "1bxdhxmiy6h4acq26lq43x2mxx6rawmfmlgsh5j7w8kyhkw5af0c";
         revert = true;
       })
+      # To fix build errors with the older system FFmpeg:
+      (githubPatch {
+        # unbundle: add libavcodec/packet.h to shim headers
+        commit = "e4d228ec30607b06bf3fed77497abef89c29966a";
+        sha256 = "02jg2bdmgjcpmk6alb72jc93wy3nf2fpa72hb4aarq337i2mwn4v";
+      })
+      (githubPatch {
+        # Roll src/third_party/ffmpeg/ 7e1d53a09..cf7ee6598 (1000 commits)
+        commit = "3ec3b2992238d4b4764f99f04605e154688c7990";
+        sha256 = "1fwb154s5qcis490rvcvm14zrmaj59g5lg9zg8ada36vw9hycbrf";
+        revert = true;
+      })
     ];
 
     postPatch = ''