diff --git a/pkgs/os-specific/linux/otpw/default.nix b/pkgs/os-specific/linux/otpw/default.nix
index 14381ac68c16..6c53bf16efc1 100644
--- a/pkgs/os-specific/linux/otpw/default.nix
+++ b/pkgs/os-specific/linux/otpw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pam }:
+{ lib, stdenv, fetchurl, pam, libxcrypt }:
 
 stdenv.mkDerivation rec {
   pname = "otpw";
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     cp *.8 $out/share/man/man8
   '';
 
-  buildInputs = [ pam ];
+  buildInputs = [ pam libxcrypt ];
 
   hardeningDisable = [ "stackprotector" ];