diff --git a/maintainers/upload-release.pl b/maintainers/upload-release.pl
index 07b19c13f..d6fdc66d6 100755
--- a/maintainers/upload-release.pl
+++ b/maintainers/upload-release.pl
@@ -179,6 +179,9 @@ if ($isLatest) {
     system("docker manifest push nixos/nix:latest") == 0 or die;
 }
 
+# Allows Nixpkgs to assemble nix-fallback-paths.nix from the Hydra release builds
+write_file("$tmpDir/hydra-eval-id", "$evalId");
+
 # Upload release files to S3.
 for my $fn (glob "$tmpDir/*") {
     my $name = basename($fn);
@@ -199,24 +202,6 @@ for my $fn (glob "$tmpDir/*") {
     }
 }
 
-# Print new nix-fallback-paths.nix.
-if ($isLatest) {
-    sub getStorePath {
-        my ($jobName) = @_;
-        my $buildInfo = decode_json(fetch("$evalUrl/job/$jobName", 'application/json'));
-        return $buildInfo->{buildoutputs}->{out}->{path} or die "cannot get store path for '$jobName'";
-    }
-
-    print STDERR "nixos/modules/installer/tools/nix-fallback-paths.nix:\n" .
-               "{\n" .
-               "  x86_64-linux = \"" . getStorePath("build.x86_64-linux") . "\";\n" .
-               "  i686-linux = \"" . getStorePath("build.i686-linux") . "\";\n" .
-               "  aarch64-linux = \"" . getStorePath("build.aarch64-linux") . "\";\n" .
-               "  x86_64-darwin = \"" . getStorePath("build.x86_64-darwin") . "\";\n" .
-               "  aarch64-darwin = \"" . getStorePath("build.aarch64-darwin") . "\";\n" .
-               "}\n";
-}
-
 # Update the "latest" symlink.
 $channelsBucket->add_key(
     "nix-latest/install", "",