diff --git a/nix/configurations/tungsten.nix b/nix/configurations/tungsten.nix
index 55f95fd9..d506da06 100644
--- a/nix/configurations/tungsten.nix
+++ b/nix/configurations/tungsten.nix
@@ -44,7 +44,7 @@ in
           flake.source = sources.nixpkgs;
         };
 
-        system.nixos.version = lib.substring 0 8 sources.nixpkgs.rev;
+        system.nixos.version = lib.substring 0 8 sources.nixpkgs.revision;
       }
 
       #
diff --git a/nix/configurations/vanadium.nix b/nix/configurations/vanadium.nix
index f11adc27..c89b82e6 100644
--- a/nix/configurations/vanadium.nix
+++ b/nix/configurations/vanadium.nix
@@ -64,7 +64,7 @@ in
           flake.source = sources.nixpkgs;
         };
 
-        system.nixos.version = lib.substring 0 8 sources.nixpkgs.rev;
+        system.nixos.version = lib.substring 0 8 sources.nixpkgs.revision;
       }
 
       #
diff --git a/nix/overlays/nil.nix b/nix/overlays/nil.nix
index 699af229..778895ee 100644
--- a/nix/overlays/nil.nix
+++ b/nix/overlays/nil.nix
@@ -2,7 +2,8 @@
 let
   sources = import ../sources.nix;
   inherit (sources) nil;
+  inherit (nil.repository) owner repo;
 in
   final: _: {
-    nil = (builtins.getFlake "github:${nil.owner}/${nil.repo}/${nil.rev}").packages.${final.system}.default;
+    nil = (builtins.getFlake "github:${owner}/${repo}/${nil.revision}").packages.${final.system}.default;
   }