diff --git a/pkgs/applications/window-managers/compton/default.nix b/pkgs/applications/window-managers/compton/default.nix
index efa820b0b6a2..7efacafd6a1c 100644
--- a/pkgs/applications/window-managers/compton/default.nix
+++ b/pkgs/applications/window-managers/compton/default.nix
@@ -14,7 +14,6 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ pkgconfig dbus libconfig libdrm libxml2 mesa pcre
     libXcomposite libXfixes libXdamage libXinerama libXrandr libXrender libXext ];
-  buildFlagsArray = ["CFLAGS=-O3 -fomit-frame-pointer"];
   installFlags = "PREFIX=$(out)";
 
   meta = with stdenv.lib; {
diff --git a/pkgs/applications/window-managers/compton/git.nix b/pkgs/applications/window-managers/compton/git.nix
index 18325ccc1b47..be2586c9e270 100644
--- a/pkgs/applications/window-managers/compton/git.nix
+++ b/pkgs/applications/window-managers/compton/git.nix
@@ -34,7 +34,6 @@ stdenv.mkDerivation {
     pkgconfig
   ];
 
-  buildFlagsArray = ["CFLAGS=-O3 -fomit-frame-pointer"];
   installFlags = "PREFIX=$(out)";
 
   meta = with stdenv.lib; {