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-rw-r--r--nixpkgs/pkgs/tools/misc/brltty/default.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/tools/misc/brltty/default.nix b/nixpkgs/pkgs/tools/misc/brltty/default.nix
index 6635f2931955..99ba8e5e5159 100644
--- a/nixpkgs/pkgs/tools/misc/brltty/default.nix
+++ b/nixpkgs/pkgs/tools/misc/brltty/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, fetchurl, pkgconfig, python3, alsaSupport, alsaLib ? null, bluez, systemdSupport, systemd ? null }:
+{ stdenv, fetchurl, pkgconfig, python3, bluez
+, alsaSupport ? stdenv.isLinux, alsaLib ? null
+, systemdSupport ? stdenv.isLinux, systemd ? null }:
 
 assert alsaSupport -> alsaLib != null;
 assert systemdSupport -> systemd != null;