diff --git a/pkgs/tools/misc/slop/default.nix b/pkgs/tools/misc/slop/default.nix
index f6c4c3548e2..d1e5a2451a7 100644
--- a/pkgs/tools/misc/slop/default.nix
+++ b/pkgs/tools/misc/slop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake
+{ stdenv, fetchFromGitHub, cmake, pkgconfig
 , glew, glm, mesa, libX11, libXext, libXrender, cppcheck, icu}:
 
 stdenv.mkDerivation rec {
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "0is3mh2d1jqgvv72v5x92w23yf26n8n384nbr1b6cn883aw8j7jz";
   };
 
-  nativeBuildInputs = [ cmake ];
+  nativeBuildInputs = [ cmake pkgconfig ];
   buildInputs = [ glew glm mesa libX11 libXext libXrender icu ]
                 ++ stdenv.lib.optional doCheck cppcheck;