Build master fails, ‘YQ2_OSTYPE’ undeclared

[Eonfge]

FAILED: CMakeFiles/game.dir/src/savegame/savegame.c.o 
/usr/bin/cc -DYQ2ARCH=\"x86_64\" -DYQ2OSTYPE=\"Linux\" -Dgame_EXPORTS  -O2 -pipe -g -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -Wall -fno-strict-aliasing -fwrapv -O2 -g -DNDEBUG -fPIC -MD -MT CMakeFiles/game.dir/src/savegame/savegame.c.o -MF CMakeFiles/game.dir/src/savegame/savegame.c.o.d -o CMakeFiles/game.dir/src/savegame/savegame.c.o -c /run/build/zaero/src/savegame/savegame.c
/run/build/zaero/src/savegame/savegame.c:65:2: error: #error YQ2_OSTYPE should be defined by the build system
   65 | #error YQ2_OSTYPE should be defined by the build system
      |  ^~~~~
/run/build/zaero/src/savegame/savegame.c:69:2: error: #error YQ2_ARCH should be defined by the build system
   69 | #error YQ2_ARCH should be defined by the build system
      |  ^~~~~
/run/build/zaero/src/savegame/savegame.c: In function ‘WriteGame’:
/run/build/zaero/src/savegame/savegame.c:774:26: error: ‘YQ2_OSTYPE’ undeclared (first use in this function); did you mean ‘YQ2OSTYPE’?
  774 |         Q_strlcpy(sv.os, YQ2_OSTYPE, sizeof(sv.os) - 1);
      |                          ^~~~~~~~~~
      |                          YQ2OSTYPE
/run/build/zaero/src/savegame/savegame.c:774:26: note: each undeclared identifier is reported only once for each function it appears in
/run/build/zaero/src/savegame/savegame.c:775:28: error: ‘YQ2_ARCH’ undeclared (first use in this function); did you mean ‘YQ2ARCH’?
  775 |         Q_strlcpy(sv.arch, YQ2_ARCH, sizeof(sv.arch));
      |                            ^~~~~~~~
      |                            YQ2ARCH
/run/build/zaero/src/savegame/savegame.c: In function ‘ReadGame’:
/run/build/zaero/src/savegame/savegame.c:877:40: error: ‘YQ2_OSTYPE’ undeclared (first use in this function); did you mean ‘YQ2OSTYPE’?
  877 |                 else if (strcmp(sv.os, YQ2_OSTYPE) != 0)
      |                                        ^~~~~~~~~~
      |                                        YQ2OSTYPE
/run/build/zaero/src/savegame/savegame.c:882:42: error: ‘YQ2_ARCH’ undeclared (first use in this function); did you mean ‘YQ2ARCH’?
  882 |                 else if (strcmp(sv.arch, YQ2_ARCH) != 0)
      |                                          ^~~~~~~~
      |                                          YQ2ARCH

Full build log is here:

https://buildbot.flathub.org/#/builders/37/builds/12308/steps/7/logs/stdio