sssd: fix nss collision with upstream patch

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

@@ -24,6 +24,11 @@ stdenv.mkDerivation rec {
       url = "https://github.com/SSSD/sssd/commit/bc56b10aea999284458dcc293b54cf65288e325d.patch";
       sha256 = "0q74sx5n41srq3kdn55l5j1sq4xrjsnl5y4v8yh5mwsijj74yh4g";
     })
+    # Fix collision with external nss symbol
+    (fetchpatch {
+      url = "https://github.com/SSSD/sssd/commit/fe9eeb51be06059721e873f77092b1e9ba08e6c1.patch";
+      sha256 = "0b83b2w0rnvm26pg03a4lpmkmi7n3gqxg7lk751q61q79gnzrpz4";
+    })
   ];
 
   # Something is looking for <libxml/foo.h> instead of <libxml2/libxml/foo.h>
@@ -54,16 +59,6 @@ stdenv.mkDerivation rec {
     configureFlagsArray+=("--with-sudo")
   '';
 
-  preBuild = ''
-    # glibc-2.32 includes a full set of NSS stub module declarations
-    # that conflict with the ones in sssd source. Define _NSS_H to
-    # prevent them from breaking the compilation, but just for this
-    # one file.
-    cat >> Makefile <<EOF
-      src/responder/nss/nss_cmd.\$(OBJEXT) : DEFS = -DHAVE_CONFIG_H -D_NSS_H
-    EOF
-  '';
-
   enableParallelBuilding = true;
   buildInputs = [ augeas dnsutils c-ares curl cyrus_sasl ding-libs libnl libunistring nss
                   samba nfs-utils doxygen python python3 popt