Description:
The ncmpcpp package is currently failing to build:

g++ -DHAVE_CONFIG_H -I. -I.. -D_FORTIFY_SOURCE=2 -DU_USING_ICU_NAMESPACE=1 -DU_USING_ICU_NAMESPACE=0 -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 -I/usr/include/taglib -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -std=c++14 -MT screens/song_info.o -MD -MP -MF $depbase.Tpo -c -o screens/song_info.o screens/song_info.cpp &&\
mv -f $depbase.Tpo $depbase.Po
<command-line>: warning: "U_USING_ICU_NAMESPACE" redefined
<command-line>: note: this is the location of the previous definition
<command-line>: warning: "U_USING_ICU_NAMESPACE" redefined
<command-line>: note: this is the location of the previous definition
depbase=`echo screens/sort_playlist.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
g++ -DHAVE_CONFIG_H -I. -I.. -D_FORTIFY_SOURCE=2 -DU_USING_ICU_NAMESPACE=1 -DU_USING_ICU_NAMESPACE=0 -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 -I/usr/include/taglib -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -std=c++14 -MT screens/sort_playlist.o -MD -MP -MF $depbase.Tpo -c -o screens/sort_playlist.o screens/sort_playlist.cpp &&\
mv -f $depbase.Tpo $depbase.Po
<command-line>: warning: "U_USING_ICU_NAMESPACE" redefined
<command-line>: note: this is the location of the previous definition
make[2]: *** [Makefile:751: screens/help.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/tmp/ncmpcpp-archlinuxrb-build-M5TJM1Zg/ncmpcpp/trunk/src/ncmpcpp-0.8.2/src'
make[1]: *** [Makefile:495: all-recursive] Error 1
make[1]: Leaving directory '/tmp/ncmpcpp-archlinuxrb-build-M5TJM1Zg/ncmpcpp/trunk/src/ncmpcpp-0.8.2'
make: *** [Makefile:406: all] Error 2
==> ERROR: A failure occurred in build().
Aborting...

Additional info:
https://tests.reproducible-builds.org/archlinux/community/ncmpcpp/build1.log

Steps to reproduce:
Run makepkg in the directory