[user@laptop ~]$ sudo pacman -Syu
:: Synchronizing package databases...
 antergos is up to date     0.0   B  0.00B/s 00:00 [----------------------]   0%
 core is up to date
 extra                   1683.8 KiB  1651K/s 00:01 [######################] 100%
 community is up to date
 multilib is up to date
:: Starting full system upgrade...
:: Replace libx264 with extra/x264? [Y/n] 
:: Replace libx264-all with extra/x264? [Y/n] 
resolving dependencies...
looking for conflicting packages...
warning: dependency cycle detected:
warning: x264 will be installed before its ffmpeg dependency

Packages (13) ffmpeg-1:4.0.2-2  gst-plugins-ugly-1.14.2-3  iproute2-4.18.0-1
              l-smash-2.14.5-1  libx264-2:152.20171224-2 [removal]
              libx264-all-2:152.20171224-2 [removal]
              nodejs-lts-carbon-8.11.4-1  npm-6.4.0-1
              python-setuptools-1:40.0.0-1  python2-setuptools-1:40.0.0-1
              tracker-2.1.2-1  tracker-miners-2.1.1-1  x264-2:155.r0a84d986-2

Total Installed Size:  81.59 MiB
Net Upgrade Size:       1.35 MiB

:: Proceed with installation? [Y/n] 
(11/11) checking keys in keyring                   [######################] 100%
(11/11) checking package integrity                 [######################] 100%
(11/11) loading package files                      [######################] 100%
(11/11) checking for file conflicts                [######################] 100%
error: failed to commit transaction (conflicting files)
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npm: /usr/lib/node_modules/npm/node_modules/performance-now/lib/performance-now.js.map exists in filesystem
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npm: /usr/lib/node_modules/npm/node_modules/performance-now/test/scripts/delayed-call.coffee exists in filesystem
npm: /usr/lib/node_modules/npm/node_modules/performance-now/test/scripts/delayed-require.coffee exists in filesystem
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npm: /usr/lib/node_modules/npm/node_modules/qs/.editorconfig exists in filesystem
npm: /usr/lib/node_modules/npm/node_modules/request/lib/hawk.js exists in filesystem
Errors occurred, no packages were upgraded.