slurm-spank-stunnel: use getDev

Author: markuskowa

pkgs/servers/computing/slurm-spank-stunnel/default.nix

@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   patches = [ ./hostlist.patch ];
 
   buildPhase = ''
-    gcc -I${slurm.dev}/include -shared -fPIC -o stunnel.so slurm-spank-stunnel.c
+    gcc -I${lib.getDev slurm}/include -shared -fPIC -o stunnel.so slurm-spank-stunnel.c
   '';
 
   installPhase = ''