diff --git a/pkgs/applications/networking/browsers/firefox-bin/default.nix b/pkgs/applications/networking/browsers/firefox-bin/default.nix
index 6b8a3b1c3381..f1b1b26ae3a2 100644
--- a/pkgs/applications/networking/browsers/firefox-bin/default.nix
+++ b/pkgs/applications/networking/browsers/firefox-bin/default.nix
@@ -92,7 +92,6 @@ stdenv.mkDerivation {
   libPath = lib.makeLibraryPath
     [ stdenv.cc.cc
       alsaLib
-      (lib.getDev alsaLib)
       atk
       cairo
       curl
@@ -128,7 +127,6 @@ stdenv.mkDerivation {
       pango
       libheimdal
       libpulseaudio
-      (lib.getDev libpulseaudio)
       systemd
       ffmpeg
     ] + ":" + lib.makeSearchPathOutput "lib" "lib64" [