You are right.

I went through all the meson.build in the project, could not find
anything weird.

build-wine32.txt has

--8<---------------cut here---------------start------------->8---
cpp_link_args=['-m32', '-mwindows']
--8<---------------cut here---------------end--------------->8---

so I patched it to

--8<---------------cut here---------------start------------->8---
cpp_link_args=['-m32', '-mwindows', '-Wl,-rpath=/gnu/store/lbh22ci6rg780fvxclik5mkgi1z73qfn-dxvk32-1.6/lib']
--8<---------------cut here---------------end--------------->8---

Still no difference.

-- 
Pierre Neidhardt
https://ambrevar.xyz/