That does not solve the issue.

When building with:

make -j8 src/espeak-ng src/espeak-ng
make

I get:

Compiling 'bn_extra'
    0 entries
Compiling: 'bn_rules'
    168 rules, 68 groups (67)

Error processing file '/build/espeak/src/espeak-ng/espeak-ng-data/temp': No such file or directory.
cd dictsource && ESPEAK_DATA_PATH=/build/espeak/src/espeak-ng LD_LIBRARY_PATH=../src: ../src/espeak-ng --compile=el && cd ..
    1528 entries
Compiling: 'af_extra'
    0 entries
make[1]: *** [Makefile:1896 espeak-ng-data/cs_dict] Error 1
make[1]: *** Waiting for unfinished jobs....
Compiling: 'af_rules'
    11153 entries
Compiling: 'da_extra'
    0 entries
Compiling: 'da_rules'
    5156 rules, 60 groups (0)

Can't read dictionary file: '/build/espeak/src/espeak-ng/espeak-ng-data/de_dict'
Using phonemetable: 'de'
Compiling: 'de_list'
    653 entries
Compiling: 'de_extra'
    0 entries
Compiling: 'de_rules'
Can't read dictionary file: '/build/espeak/src/espeak-ng/espeak-ng-data/el_dict'
Using phonemetable: 'el'
Compiling: 'el_list'
    379 entries
Compiling: 'el_extra'
    0 entries
Compiling: 'el_rules'
    182 rules, 27 groups (26)

Error processing file '/build/espeak/src/espeak-ng/espeak-ng-data/temp': No such file or directory.
make[1]: *** [Makefile:1908 espeak-ng-data/da_dict] Error 1
Error processing file '/build/espeak/src/espeak-ng/espeak-ng-data/temp': No such file or directory.
make[1]: *** [Makefile:1914 espeak-ng-data/de_dict] Error 1
/bin/sh: line 1:  6052 Segmentation fault      (core dumped) ESPEAK_DATA_PATH=/build/espeak/src/espeak-ng LD_LIBRARY_PATH=../src: ../src/espeak-ng --compile=af
make[1]: *** [Makefile:1848 espeak-ng-data/af_dict] Error 139
make[1]: Leaving directory '/build/espeak/src/espeak-ng'
make: *** [Makefile:502 all] Error 2