wiringpi: fix build with libxcrypt

pkgs/os-specific/linux/wiringpi/default.nix

@@ -2,6 +2,7 @@
 , stdenv
 , symlinkJoin
 , fetchFromGitHub
+, libxcrypt
 }:
 
 let
@@ -35,6 +36,9 @@ let
     inherit mkSubProject;
     wiringPi = mkSubProject {
       subprj = "wiringPi";
+      buildInputs = [
+        libxcrypt
+      ];
     };
     devLib = mkSubProject {
       subprj = "devLib";
@@ -45,6 +49,7 @@ let
     wiringPiD = mkSubProject {
       subprj = "wiringPiD";
       buildInputs = [
+        libxcrypt
         passthru.wiringPi
         passthru.devLib
       ];
@@ -52,6 +57,7 @@ let
     gpio = mkSubProject {
       subprj = "gpio";
       buildInputs = [
+        libxcrypt
         passthru.wiringPi
         passthru.devLib
       ];