diff --git a/pkgs/build-support/fetchgit/default.nix b/pkgs/build-support/fetchgit/default.nix
index fd267fe34de8a..42e449059a6d1 100644
--- a/pkgs/build-support/fetchgit/default.nix
+++ b/pkgs/build-support/fetchgit/default.nix
@@ -33,6 +33,7 @@ lib.makeOverridable (lib.fetchers.withNormalizedHash { } (
 , # Impure env vars (https://nixos.org/nix/manual/#sec-advanced-attributes)
   # needed for netrcPhase
   netrcImpureEnvVars ? []
+, passthru ? {}
 , meta ? {}
 , allowedRequisites ? null
 }:
@@ -121,6 +122,6 @@ stdenvNoCC.mkDerivation {
   passthru = {
     gitRepoUrl = url;
     inherit tag;
-  };
+  } // passthru;
 }
 ))
diff --git a/pkgs/build-support/fetchgithub/default.nix b/pkgs/build-support/fetchgithub/default.nix
index 6d580b2e06566..cbb3b987c24fa 100644
--- a/pkgs/build-support/fetchgithub/default.nix
+++ b/pkgs/build-support/fetchgithub/default.nix
@@ -10,6 +10,7 @@ lib.makeOverridable (
 , fetchLFS ? false
 , sparseCheckout ? []
 , githubBase ? "github.com", varPrefix ? null
+, passthru ? { }
 , meta ? { }
 , ... # For hash agility
 }@args:
@@ -26,6 +27,9 @@ let
       builtins.unsafeGetAttrPos "rev" args
   );
   baseUrl = "https://${githubBase}/${owner}/${repo}";
+  newPassthru = {
+    inherit owner repo;
+  } // passthru;
   newMeta = meta // {
     homepage = meta.homepage or baseUrl;
   } // lib.optionalAttrs (position != null) {
@@ -63,17 +67,25 @@ let
 
   fetcherArgs = (if useFetchGit
     then {
-      inherit tag rev deepClone fetchSubmodules sparseCheckout fetchLFS; url = gitRepoUrl;
+      inherit tag rev deepClone fetchSubmodules sparseCheckout fetchLFS;
+      url = gitRepoUrl;
+      passthru = newPassthru;
     } // lib.optionalAttrs (leaveDotGit != null) { inherit leaveDotGit; }
     else {
       url = "${baseUrl}/archive/${revWithTag}.tar.gz";
 
       passthru = {
-        inherit gitRepoUrl;
-      };
+        inherit
+          gitRepoUrl
+          tag
+          ;
+        rev = revWithTag;
+      } // newPassthru;
     }
-  ) // privateAttrs // passthruAttrs // { inherit name; };
+  ) // privateAttrs // passthruAttrs // {
+    inherit name;
+    meta = newMeta;
+  };
 in
 
-fetcher fetcherArgs // { meta = newMeta; inherit owner repo tag; rev = revWithTag; }
-)
+fetcher fetcherArgs)