fetchurl, fetchgit: use __structuredAttrs = true and pass curlOptsList and sparseCheckout as lists (#464475)

pkgs/build-support/fetchgit/builder.sh

@@ -4,6 +4,8 @@
 # - revision specified and remote without HEAD
 #
 
+source "$NIX_ATTRS_SH_FILE"
+
 echo "exporting $url (rev $rev) into $out"
 
 runHook preFetch

pkgs/build-support/fetchgit/default.nix

@@ -138,6 +138,8 @@ lib.makeOverridable (
 
         derivationArgs
         // {
+          __structuredAttrs = true;
+
           inherit name;
 
           builder = ./builder.sh;
@@ -243,7 +245,11 @@ lib.makeOverridable (
               "FETCHGIT_HTTP_PROXIES"
             ];
 
-          inherit preferLocalBuild meta allowedRequisites;
+          outputChecks.out = {
+            ${if allowedRequisites != null then "allowedRequisites" else null} = allowedRequisites;
+          };
+
+          inherit preferLocalBuild meta;
 
           passthru = {
             gitRepoUrl = url;