default.nix

{ stdenv,
  cmake,
  freetype,
  fontconfig,
  xclip,
  pkgconfig,
  fetchFromGitHub,
  libX11,
  gperf,
  libXcursor,
  libXxf86vm,
  libXi,
  rustPlatform
}:

with rustPlatform;

buildRustPackage rec {
  name = "ethabi-${version}";
  version = "git";

  src = fetchFromGitHub {
    owner = "jwilm";
    repo = "alacritty";
    rev = "715d4f8be8b80604a0b6a8464e55a60660f810a0";
    sha256 = "1asqqaz4n6flax0sw90ry1f9gp0kfs7bzpjpa652a8ja5xpl82a8";
  };

  depsSha256 = "1vag8dxz67qvrp5x5xccy88aibxy2ih1bz14bmjgi9zwrv17gz6v";

  buildInputs = [ cmake xclip freetype fontconfig ];

  nativeBuildInputs = [
    pkgconfig
    libX11
    libXcursor
    libXxf86vm
    libXi
    fontconfig
  ];

  meta = {
    description = "A cross-platform, GPU-accelerated terminal emulator";
    homepage = https://github.com/jwilm/alacritty/;
  };
}

$ ./result/bin/alacritty 
Alacritty encountered an unrecoverable error:

        Error creating glutin::Window; No backend is available

This is caused by glutin relying on dlopen() to open the X11 libraries. Make sure those are in LD_LIBRARY_PATH.
AFAIK you'll have to wrap the binary to achieve that. Build a libpath with pkgs.stdenv.lib.makeLibraryPath and append that to the wrapper with --suffix LD_LIBRARY_PATH : ${yourlibrarypath}

Alternatively you could ensure they are present in the binary's rpath, but that requires deeper knowledge of the construction of ELF binaries than I posses.