$ nix-env -i clang
installing `clang-3.4'
building path(s) `/nix/store/ca4l5ydbbcvh47gjsb206wx0am16dpmh-user-environment'
collision between `/nix/store/vmjak1j0gnxjzzah67440xda2hfmw515-clang-3.4/lib/LLVMgold.so' and `/nix/store/6s3mwfy4pjk857hs75pmcwrx2m4bgvig-llvm-3.4/lib/LLVMgold.so'; use `nix-env --set-flag priority NUMBER PKGNAME' to change the priority of one of the conflicting packages
builder for `/nix/store/vnz04kkcrk7z3vmajzxkivirlbdaj9x1-user-environment.drv' failed with exit code 2
error: build of `/nix/store/vnz04kkcrk7z3vmajzxkivirlbdaj9x1-user-environment.drv' failed
I recently deleted my ~/.nix-defexpr folder and replaced it with the github.com/NixOS/nixpkgs.
I recently deleted my
~/.nix-defexpr
folder and replaced it with the github.com/NixOS/nixpkgs.How shall I resolve this?