diff --git a/pkgs/development/libraries/science/math/or-tools/default.nix b/pkgs/development/libraries/science/math/or-tools/default.nix
index 5c142d5f0c8..5deaf25f61b 100644
--- a/pkgs/development/libraries/science/math/or-tools/default.nix
+++ b/pkgs/development/libraries/science/math/or-tools/default.nix
@@ -25,13 +25,10 @@ stdenv.mkDerivation rec {
     EOF
   '';
 
-  buildPhase = ''
-    make cc
-  '';
+  makeFlags = [ "prefix=${placeholder "out"}" ];
+  buildFlags = [ "cc" ];
 
-  installPhase = ''
-    make install_cc prefix=$out
-  '';
+  installTargets = [ "install_cc" ];
 
   nativeBuildInputs = [
     cmake lsb-release which zlib