2 files changed, 5 insertions, 5 deletions
diff --git a/tools/nixery/build-image/build-image.nix b/tools/nixery/build-image/build-image.nix
index cd0ef91b3135..8f54f53261b2 100644
--- a/tools/nixery/build-image/build-image.nix
+++ b/tools/nixery/build-image/build-image.nix
@@ -35,6 +35,9 @@
   # layers. To allow for some extensibility (via additional layers),
   # the default here is set to something a little less than that.
   maxLayers ? 96,
+  # Popularity data for layer solving is fetched from the URL passed
+  # in here.
+  popularityUrl ? "https://storage.googleapis.com/nixery-layers/popularity/popularity-19.03.173490.5271f8dddc0.json",
 
   ...
 }:
@@ -101,10 +104,7 @@ let
         fetched = (map (deepFetch pkgs) (fromJSON packages));
     in foldl' splitter init fetched;
 
-  popularity = builtins.fetchurl {
-    url = "https://storage.googleapis.com/nixery-layers/popularity/nixos-19.03-20190812.json";
-    sha256 = "16sxd49vqqg2nrhwynm36ba6bc2yff5cd5hf83wi0hanw5sx3svk";
-  };
+  popularity = builtins.fetchurl popularityUrl;
 
   # Before actually creating any image layers, the store paths that need to be
   # included in the image must be sorted into the layers that they should go
diff --git a/tools/nixery/build-image/default.nix b/tools/nixery/build-image/default.nix
index 6b1cea6f0ca2..3bb5d62fb0d5 100644
--- a/tools/nixery/build-image/default.nix
+++ b/tools/nixery/build-image/default.nix
@@ -22,7 +22,7 @@
   # all arguments of build-image.nix.
 , srcType ? "nixpkgs"
 , srcArgs ? "nixos-19.03"
-, tag ? null, name ? null, packages ? null, maxLayers ? null
+, tag ? null, name ? null, packages ? null, maxLayers ? null, popularityUrl ? null
 }@args:
 
 let pkgs = import ./load-pkgs.nix { inherit srcType srcArgs; };