diff --git a/pkgs/applications/video/aegisub/default.nix b/pkgs/applications/video/aegisub/default.nix
index d4208aee62e..a613ad1c584 100644
--- a/pkgs/applications/video/aegisub/default.nix
+++ b/pkgs/applications/video/aegisub/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl
+{ config, stdenv, fetchurl
 , libX11, wxGTK
 , libiconv, fontconfig, freetype
 , libGLU_combined
@@ -8,8 +8,8 @@
 , spellcheckSupport ? true, hunspell ? null
 , automationSupport ? true, lua ? null
 , openalSupport ? false, openal ? null
-, alsaSupport ? true, alsaLib ? null
-, pulseaudioSupport ? true, libpulseaudio ? null
+, alsaSupport ? stdenv.isLinux, alsaLib ? null
+, pulseaudioSupport ? config.pulseaudio or stdenv.isLinux, libpulseaudio ? null
 , portaudioSupport ? false, portaudio ? null }:
 
 assert spellcheckSupport -> (hunspell != null);
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ebb7ec105ce..b684dcd3c2b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -406,15 +406,9 @@ in
 
   aefs = callPackage ../tools/filesystems/aefs { };
 
-  aegisub = callPackage ../applications/video/aegisub {
+  aegisub = callPackage ../applications/video/aegisub ({
     wxGTK = wxGTK30;
-    spellcheckSupport = config.aegisub.spellcheckSupport or true;
-    automationSupport = config.aegisub.automationSupport or true;
-    openalSupport     = config.aegisub.openalSupport or false;
-    alsaSupport       = config.aegisub.alsaSupport or true;
-    pulseaudioSupport = config.aegisub.pulseaudioSupport or true;
-    portaudioSupport  = config.aegisub.portaudioSupport or false;
-  };
+  } // (config.aegisub or {}));
 
   aerospike = callPackage ../servers/nosql/aerospike { };