krb5: Add patches to fix build with musl on 1.18

pkgs/development/libraries/kerberos/krb5.nix

@@ -14,7 +14,7 @@ in
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "${type}krb5-${version}";
-  majorVersion = "1.18";
+  majorVersion = "1.18"; # remove patches below with next upgrade
   version = majorVersion;
 
   src = fetchurl {
@@ -22,6 +22,15 @@ stdenv.mkDerivation rec {
     sha256 = "121c5xsy3x0i4wdkrpw62yhvji6virbh6n30ypazkp0isws3k4bk";
   };
 
+  patches = optionals stdenv.hostPlatform.isMusl [
+    # TODO: Remove with next release > 1.18
+    # Patches to fix musl build with 1.18.
+    # Not using `fetchpatch` for these for now to avoid infinite recursion
+    # errors in downstream projects (unclear if it's a nixpkgs issue so far).
+    ./krb5-Fix-Linux-build-error-with-musl-libc.patch
+    ./krb5-Fix-typo-in-musl-build-fix.patch
+  ];
+
   outputs = [ "out" "dev" ];
 
   configureFlags = [ "--with-tcl=no" "--localstatedir=/var/lib"]