Makefile:751: recipe for target 'q2vkpt' failed

[deadpahn]

At top level:
src/unix/sdl2/../res/q2pro.xbm:3:22: warning: ‘q2icon_bits’ defined but not used [-Wunused-variable]
 static unsigned char q2icon_bits[] = {
                      ^~~~~~~~~~~
[CC] .q2pro/src/unix/sdl2/sound.o
[CC] .q2pro/src/unix/hunk.o
[CC] .q2pro/src/unix/system.o
[CC] .q2pro/src/unix/tty.o
[GLSL] shader_vkpt/asvgf_atrous.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/asvgf_gradient_img.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/asvgf_gradient_atrous.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/path_tracer.rmiss.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/path_tracer.rchit.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/path_tracer.rgen.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/path_tracer_rtx.rgen.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/stretch_pic.frag.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/path_tracer_rtx.rchit.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/asvgf_taa.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/instance_geometry.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/asvgf_temporal.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/path_tracer_rtx.rmiss.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/stretch_pic.vert.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/asvgf_seed_rng.comp.spv
/bin/sh: 1: glslangValidator: not found
[GLSL] shader_vkpt/asvgf_fwd_project.comp.spv
/bin/sh: 1: glslangValidator: not found
[LD] q2vkpt
.q2pro/src/client/main.o: In function `CL_Begin':
/mnt/345b0cba-d4c3-454b-b2f9-b1e8332d3342/q2vkpt/src/client/main.c:1751: undefined reference to `gl_modulate_world'
/mnt/345b0cba-d4c3-454b-b2f9-b1e8332d3342/q2vkpt/src/client/main.c:1752: undefined reference to `gl_modulate_entities'
/mnt/345b0cba-d4c3-454b-b2f9-b1e8332d3342/q2vkpt/src/client/main.c:1753: undefined reference to `gl_brightness'
.q2pro/src/client/main.o: In function `CL_ClearState':
/mnt/345b0cba-d4c3-454b-b2f9-b1e8332d3342/q2vkpt/src/client/main.c:714: undefined reference to `gl_modulate_world'
/mnt/345b0cba-d4c3-454b-b2f9-b1e8332d3342/q2vkpt/src/client/main.c:715: undefined reference to `gl_modulate_entities'
/mnt/345b0cba-d4c3-454b-b2f9-b1e8332d3342/q2vkpt/src/client/main.c:716: undefined reference to `gl_brightness'
collect2: error: ld returned 1 exit status
Makefile:751: recipe for target 'q2vkpt' failed
make: *** [q2vkpt] Error 1