diff --git a/nix/configurations/hetzner_benchmark.nix b/nix/configurations/hetzner_benchmark.nix
index f14a3cf9..2fddb026 100644
--- a/nix/configurations/hetzner_benchmark.nix
+++ b/nix/configurations/hetzner_benchmark.nix
@@ -47,7 +47,14 @@ in
 
       nix.package = pkgs.nix-monitored;
 
-      system.nixos.version = lib.substring 0 8 sources.nixpkgs.revision;
+      system.nixos =
+        let
+          rev = lib.substring 0 8 sources.nixpkgs.revision;
+        in
+        {
+          versionSuffix = "-git:${rev}";
+          revision = rev;
+        };
     }
 
     ./hetzner_benchmark/nixos/hardware-configuration.nix
diff --git a/nix/configurations/hydrogen.nix b/nix/configurations/hydrogen.nix
index f26705ea..c751ef0a 100644
--- a/nix/configurations/hydrogen.nix
+++ b/nix/configurations/hydrogen.nix
@@ -53,7 +53,14 @@ in
 
       nix.package = pkgs.nix-monitored;
 
-      system.nixos.version = lib.substring 0 8 sources.nixpkgs.revision;
+      system.nixos =
+        let
+          rev = lib.substring 0 8 sources.nixpkgs.revision;
+        in
+        {
+          versionSuffix = "-git:${rev}";
+          revision = rev;
+        };
     }
 
     ./hydrogen/nixos/misc.nix
diff --git a/nix/configurations/installer.nix b/nix/configurations/installer.nix
index e77b99ad..972409e9 100644
--- a/nix/configurations/installer.nix
+++ b/nix/configurations/installer.nix
@@ -4,6 +4,9 @@
 # figured out an elegant (enough) way to do it while keeping my secrets
 # encrypted.
 #
+let
+  sources = import ../../npins;
+in
 {
   pkgs,
   lib,
@@ -41,6 +44,15 @@
     ];
   };
 
+  system.nixos =
+    let
+      rev = lib.substring 0 8 sources.nixpkgs.revision;
+    in
+    {
+      versionSuffix = "-git:${rev}";
+      revision = rev;
+    };
+
   isoImage.squashfsCompression = "zstd -Xcompression-level 3";
 
   environment.systemPackages = [
diff --git a/nix/configurations/vanadium.nix b/nix/configurations/vanadium.nix
index 019b2f4f..2fba0b2a 100644
--- a/nix/configurations/vanadium.nix
+++ b/nix/configurations/vanadium.nix
@@ -78,7 +78,14 @@ in
 
       nix.package = pkgs.nix-monitored;
 
-      system.nixos.version = lib.substring 0 8 sources.nixpkgs.revision;
+      system.nixos =
+        let
+          rev = lib.substring 0 8 sources.nixpkgs.revision;
+        in
+        {
+          versionSuffix = "-git:${rev}";
+          revision = rev;
+        };
     }
 
     #