How to use libraries installed by nix at run-time?

I'm using nix in "single-user mode" in a system where I'm not the root (see below for a description of my nix setup). I wanted to quickly run one of my binaries which is dynamically linked with a library which is absent in the system. So, I've installed the library with nix: $ nix-env -qa 'gmp' gmp-4.3.2 gmp-5.1.3 $ nix-env -i gmp-5.1.3 But the library is still not found by the linker: $ ldd -r ../valencies ../valencies: /lib64/libc.so.6: version `GLIBC_2.15' not found (required by ../valencies) ../valencies: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ../valencies) linux-vdso.so.1 => (0x00007fffbbf28000) /usr/local/lib/libsnoopy.so (0x00007f4dcfbdc000) libgmp.so.10 => not found libffi.so.5 => /usr/lib64/libffi.so.5 (0x00007f4dcf9cc000) libm.so.6 => /lib64/libm.so.6 (0x00007f4dcf748000) librt.so.1 => /lib64/librt.so.1 (0x00007f4dcf540000) libdl.so.2 => /lib64/libdl.so.2 (0x00007f4dcf33c000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f4dcf11f000) libc.so.6 => /lib64/libc.so.6 (0x00007f4dced8b000) /lib64/ld-linux-x86-64.so.2 (0x00007f4dcfde7000) undefined symbol: __gmpz_gcd (../valencies) undefined symbol: __gmpn_cmp (../valencies) undefined symbol: __gmpz_mul (../valencies) undefined symbol: __gmpz_fdiv_r (../valencies) undefined symbol: __gmpz_fdiv_q_2exp (../valencies) undefined symbol: __gmpz_com (../valencies) undefined symbol: __gmpn_gcd_1 (../valencies) undefined symbol: __gmpz_sub (../valencies) symbol memcpy, version GLIBC_2.14 not defined in file libc.so.6 with link time reference (../valencies) undefined symbol: __gmpz_fdiv_q (../valencies) undefined symbol: __gmpz_fdiv_qr (../valencies) undefined symbol: __gmpz_add (../valencies) undefined symbol: __gmpz_init (../valencies) undefined symbol: __gmpz_ior (../valencies) undefined symbol: __gmpz_mul_2exp (../valencies) undefined symbol: __gmpz_xor (../valencies) undefined symbol: __gmpz_and (../valencies) symbol __fdelt_chk, version GLIBC_2.15 not defined in file libc.so.6 with link time reference (../valencies) undefined symbol: __gmpz_tdiv_qr (../valencies) undefined symbol: __gmp_set_memory_functions (../valencies) undefined symbol: __gmpz_tdiv_q (../valencies) undefined symbol: __gmpz_divexact (../valencies) undefined symbol: __gmpz_tdiv_r (../valencies) $ Look, it is present in the filesystem: $ find / -name 'libgmp.so.10' 2>/dev/null /nix/store/mnmzq0qbrvw6dv1k2vj3cwz9ffdh05zr-user-environment/lib/libgmp.so.10 /nix/store/fnww2w81hv5v3dl9gsb7p4llb7z7krzd-gmp-5.1.3/lib/libgmp.so.10 $ What do I do so that libraries installed by nix are "visible"? Probably, the standard user-installation script of nix modifies .bash_profile to add its bin/ into PATH, but does not do something analogous for libraries. ###My nix setup: The only thing I have asked the root to do for me was: mkdir -m 0755 /nix && chown ivan /nix, otherwise I've followed the standard simple nix installation procedure. So now I can use custom programs from nix packages. I couldn't do this nicely without any help from the root at all, i.e., without /nix/, because /nix/ was not available for me; I could of course use another directory, but then the pre-built binary packages wouldn't be valid and all packages would have to be rebuilt, according to the nix documentation. In my case, it was simpler to ask for /nix/ for me. Another thing I've done is adding to ~/.bash_profile: export NIX_CONF_DIR=/nix/etc/nix so that I can edit nix.conf. (It was supposed to be in the root-controlled /etc/ otherwise. I did it because I wanted to build-max-jobs and build-cores settings in it.)