AqBanking

libtool: compile:  /Applications/Xcode16.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -DHAVE_CONFIG_H -I. -I/Users/john/Development/Gnucash-git-11.0-arm64/src/aqbanking-6.8.0/src/libs/cli -I../../.. -I/Users/john/Development/Gnucash-git-11.0-arm64/inst/include/gwenhywfar5 -I.. -I/Users/john/Development/Gnucash-git-11.0-arm64/inst/include -arch arm64 -isysroot /Applications/Xcode16.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -O2 -arch arm64 -isysroot /Applications/Xcode16.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -mmacosx-version-min=11.0 -g -Wall -MT helper.lo -MD -MP -MF .deps/helper.Tpo -c /Users/john/Development/Gnucash-git-11.0-arm64/src/aqbanking-6.8.0/src/libs/cli/helper.c  -fno-common -DPIC -o .libs/helper.o
/Users/john/Development/Gnucash-git-11.0-arm64/src/aqbanking-6.8.0/src/libs/cli/helper.c:14:10: fatal error: 'aqbanking/i18n_l.h' file not found
   14 | #include <aqbanking/i18n_l.h>
      |          ^~~~~~~~~~~~~~~~~~~~
1 error generated.

This is fixed in git with 07bcfe6a, you need to do a new tarball.