> $ makepkg -s
==> Making package: chromium-ozone 81.0.4044.138-1 (Sat 30 May 2020 03:07:41 PM CEST)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Found chromium-81.0.4044.138.tar.xz
  -> Found chromium-launcher-6.tar.gz
  -> Found rename-Relayout-in-DesktopWindowTreeHostPlatform.patch
  -> Found rebuild-Linux-frame-button-cache-when-activation.patch
  -> Found icu67.patch
  -> Found chromium-widevine.patch
  -> Found chromium-skia-harmony.patch
  -> Found chromium-83-gcc-10.patch
==> Validating source files with sha256sums...
    chromium-81.0.4044.138.tar.xz ... Passed
    chromium-launcher-6.tar.gz ... Passed
    rename-Relayout-in-DesktopWindowTreeHostPlatform.patch ... Passed
    rebuild-Linux-frame-button-cache-when-activation.patch ... Passed
    icu67.patch ... Passed
    chromium-widevine.patch ... Passed
    chromium-skia-harmony.patch ... Passed
    chromium-83-gcc-10.patch ... Passed
==> Extracting sources...
  -> Extracting chromium-81.0.4044.138.tar.xz with bsdtar
  -> Extracting chromium-launcher-6.tar.gz with bsdtar
==> Starting prepare()...
patching file ui/views/widget/desktop_aura/desktop_window_tree_host_platform.cc
patching file ui/views/widget/desktop_aura/desktop_window_tree_host_platform.h
patching file chrome/browser/ui/views/frame/desktop_linux_browser_frame_view.cc
patching file ui/views/widget/desktop_aura/desktop_window_tree_host_platform.cc
patching file src/objects/js-number-format.cc
patching file third_party/widevine/cdm/BUILD.gn
patching file third_party/skia/src/ports/SkFontHost_FreeType.cpp
patching file chrome/browser/search/background/ntp_backgrounds.h
patching file third_party/webrtc/call/rtx_receive_stream.h
patching file third_party/webrtc/modules/audio_processing/aec3/clockdrift_detector.h
patching file ui/gfx/linux/drm_util_linux.h
patching file chrome/browser/search/background/ntp_backgrounds.h
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file chrome/browser/search/background/ntp_backgrounds.h.rej
patching file third_party/webrtc/call/rtx_receive_stream.h
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file third_party/webrtc/call/rtx_receive_stream.h.rej
patching file third_party/webrtc/modules/audio_processing/aec3/clockdrift_detector.h
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file third_party/webrtc/modules/audio_processing/aec3/clockdrift_detector.h.rej
patching file ui/gfx/linux/drm_util_linux.h
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file ui/gfx/linux/drm_util_linux.h.rej
==> ERROR: A failure occurred in prepare().
    Aborting...