Cannot build

[Ygarr]

thdwb $
 make
go: downloading github.com/go-gl/glfw/v3.3/glfw v0.0.0-20210410170116-ea3d685f79fb
go: downloading github.com/goki/freetype v0.0.0-20181231101311-fa8a33aabaff
go: downloading github.com/go-gl/gl v0.0.0-20210501111010-69f74958bac0
go: downloading golang.org/x/net v0.0.0-20210410081132-afb366fc7cd1
go: downloading golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb

command-line-arguments

/usr/bin/ld: $WORK/b001/pkg2.a(_x004.o): undefined reference to symbol 'pthread_key_delete@@GLIBC_2.2.5'
/usr/bin/ld: /usr/lib/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make: *** [Makefile:11: run] Error 2