diff --git a/hosts/by-name/servo/services/email/postfix.nix b/hosts/by-name/servo/services/email/postfix.nix
index 337ee55ae..064ced580 100644
--- a/hosts/by-name/servo/services/email/postfix.nix
+++ b/hosts/by-name/servo/services/email/postfix.nix
@@ -99,8 +99,10 @@ in
   services.postfix.hostname = "mx.uninsane.org";
   services.postfix.origin = "uninsane.org";
   services.postfix.destination = [ "localhost" "uninsane.org" ];
-  services.postfix.sslCert = "/var/lib/acme/mx.uninsane.org/fullchain.pem";
-  services.postfix.sslKey = "/var/lib/acme/mx.uninsane.org/key.pem";
+  services.postfix.config.smtpd_tls_chain_files = [
+    "/var/lib/acme/mx.uninsane.org/key.pem"
+    "/var/lib/acme/mx.uninsane.org/fullchain.pem"
+  ];
 
   # see: `man 5 virtual`
   services.postfix.virtual = ''
diff --git a/pkgs/by-name/nixpkgs-bootstrap/master.nix b/pkgs/by-name/nixpkgs-bootstrap/master.nix
index 5bdbd69f5..f933860a9 100644
--- a/pkgs/by-name/nixpkgs-bootstrap/master.nix
+++ b/pkgs/by-name/nixpkgs-bootstrap/master.nix
@@ -14,8 +14,8 @@
   mkNixpkgs ? import ./mkNixpkgs.nix {},
 }:
 mkNixpkgs {
-  rev = "407f4a093c23788a07874508108773adb25d695e";
-  sha256 = "sha256-Wf6X1VNRBRgN+Ciga2VtsJk8gZ46Mmn7yhMQ6MBePRw=";
-  version = "unstable-2025-06-14";
+  rev = "018f6ec3c2288d42fe0bf95371d4f8188cfd2f97";
+  sha256 = "sha256-JeAcMDnaqswMLgUqNw1Brab4eo/qSedzbmjoVUvYLTA=";
+  version = "unstable-2025-06-16";
   branch = "master";
 }
diff --git a/pkgs/by-name/nixpkgs-bootstrap/staging-next.nix b/pkgs/by-name/nixpkgs-bootstrap/staging-next.nix
index 1692fa34c..33877d37e 100644
--- a/pkgs/by-name/nixpkgs-bootstrap/staging-next.nix
+++ b/pkgs/by-name/nixpkgs-bootstrap/staging-next.nix
@@ -2,8 +2,8 @@
   mkNixpkgs ? import ./mkNixpkgs.nix {},
 }:
 mkNixpkgs {
-  rev = "3029e20133be398ba1573367dfde47162eef5179";
-  sha256 = "sha256-ccA/TZsxPrAyqCDKyUYWIvaeo5EiKER/jUxHZtdnN1w=";
-  version = "unstable-2025-06-14";
+  rev = "dfe18c7f6e50a33d2596cd283c9f45749bcb2d3f";
+  sha256 = "sha256-fdn/MpgquaC4X/ji3mXKXhbSu1YmvTCcd+uWsMfesyg=";
+  version = "unstable-2025-06-16";
   branch = "staging-next";
 }
diff --git a/pkgs/by-name/nixpkgs-bootstrap/staging.nix b/pkgs/by-name/nixpkgs-bootstrap/staging.nix
index c61eb4c71..2ac38069d 100644
--- a/pkgs/by-name/nixpkgs-bootstrap/staging.nix
+++ b/pkgs/by-name/nixpkgs-bootstrap/staging.nix
@@ -2,8 +2,8 @@
   mkNixpkgs ? import ./mkNixpkgs.nix {},
 }:
 mkNixpkgs {
-  rev = "57a132d403d90bb8f74365ad1ac7ef991a04b881";
-  sha256 = "sha256-vr+OUDrKROXfJSM/FaAxyIVOdQudxn902yRouAwBZfE=";
-  version = "unstable-2025-06-14";
+  rev = "3d1e6bebb203767fbe36a8666c2d825b50c269cb";
+  sha256 = "sha256-pvdMJs0BPNetIZFhwOnHnvEihkaYrGka2Js8fhIQv6M=";
+  version = "unstable-2025-06-16";
   branch = "staging";
 }