fix nix build pkgconfig issue

Author: ekg

default.nix

@@ -1,5 +1,5 @@
 { pkgs ? import <nixpkgs> {} }:
 
 pkgs.callPackage ./odgi.nix {
-  inherit (pkgs) stdenv fetchFromGitHub cmake jemalloc pkgconfig python3 gcc zlib htslib gsl;
+  inherit (pkgs) stdenv fetchFromGitHub cmake jemalloc pkg-config python3 gcc zlib htslib gsl;
 }

odgi.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, jemalloc, python3, pkgconfig, gcc, git, zlib, htslib, gsl }:
+{ lib, stdenv, fetchFromGitHub, cmake, jemalloc, python3, pkg-config, gcc, git, zlib, htslib, gsl }:
 
 stdenv.mkDerivation rec {
   pname = "odgi";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     fetchSubmodules = true;
   };
 
-  nativeBuildInputs = [ cmake pkgconfig ];
+  nativeBuildInputs = [ cmake pkg-config ];
 
   buildInputs = [
     jemalloc