» cat /run/opengl-driver/share/vulkan/icd.d/nvidia.json

{
    "file_format_version" : "1.0.0",
    "ICD": {
        "library_path": "libGLX_nvidia.so",
        "api_version" : "1.0.56"
    }
}

» readelf -d /run/opengl-driver/lib/libGLX_nvidia.so

Dynamic section at offset 0x135118 contains 28 entries:
  Tag        Type                         Name/Value
 0x000000000000001d (RUNPATH)            Library runpath: [/nix/store/a9bsniqkminc599mvnj4kqs3n2mx4y8n-nvidia-x11-387.34-4.9.78/lib:/nix/store/24garxz2cx2raclq2bci5hmzdgm2vaj3-libXext-1.3.3/lib:/nix/store/rb4vsahgqn5q4nq5k01vfqi6aiin4ax8-libX11-1.6.5/lib:/nix/store/gyjlrm76v5gnwjwp6dwjziwa73s94zc8-libXv-1.0.11/lib:/nix/store/kxf3bglw9w8xhjsb2kynmdg14axclafn-libXrandr-1.5.1/lib:/nix/store/0kmk70psfzg3pdk4sqv3s68h89817pq1-zlib-1.2.11/lib:/nix/store/bbv5gnx7b2hbkvkyfrzs0yjmakzvcvs9-gcc-6.4.0-lib/lib]
 0x0000000000000001 (NEEDED)             Shared library: [libnvidia-tls.so.387.34]
 0x0000000000000001 (NEEDED)             Shared library: [libnvidia-glcore.so.387.34]
 0x0000000000000001 (NEEDED)             Shared library: [libX11.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libXext.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libdl.so.2]
 0x000000000000000e (SONAME)             Library soname: [libGLX_nvidia.so.0]
 0x0000000000000010 (SYMBOLIC)           0x0
 0x000000000000000c (INIT)               0x4e380
 0x000000000000000d (FINI)               0xfc000
 0x0000000000000004 (HASH)               0x120
 0x0000000000000005 (STRTAB)             0x33c318
 0x0000000000000006 (SYMTAB)             0x4de0
 0x000000000000000a (STRSZ)              57670 (bytes)
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000003 (PLTGOT)             0x32f9b8
 0x0000000000000002 (PLTRELSZ)           4440 (bytes)
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000017 (JMPREL)             0x4d220
 0x0000000000000007 (RELA)               0x24fc0
 0x0000000000000008 (RELASZ)             164448 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x000000006ffffffe (VERNEED)            0x24f80
 0x000000006fffffff (VERNEEDNUM)         2
 0x000000006ffffff0 (VERSYM)             0x2392c
 0x000000006ffffff9 (RELACOUNT)          6831
 0x0000000000000000 (NULL)               0x0