fetch-release: fix signature verification!

`gpg --verify nar-hash.txt.asc` with a single argument lets gpg pick the
verification mode from the file's packet structure. For a real detached
signature it hashes the sibling nar-hash.txt, but for an inline signed
message it verifies the payload embedded in the .asc itself, never reads
nar-hash.txt, prints "not a detached signature; file was NOT verified!"
and still exits 0. The `&> /dev/null` hid that warning.

.github/workflows/test.yml

@@ -49,5 +49,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v31
       - run: nix flake check --all-systems
-      - run: ./test/nixos-search/ci-test.sh
+      # FIXME: Re-enable when the nixos-search input is usable again.
+      # This is also disabled in ./test/run-tests.sh.
+      # - run: ./test/nixos-search/ci-test.sh
       - run: ./test/shellcheck.sh

README.md

@@ -1,3 +1,7 @@
+> [!WARNING]
+> **Archived and unmaintained as of August 13, 2026.**
+> v0.0.139 is the final release; there will be no further updates or security fixes.
+
 <p align="center">
   <img
     width="320"

SECURITY.md

@@ -16,7 +16,12 @@ You can import a GPG key by running the following command with that individual
 
 ## Wall of Fame
 
-*empty*
+### [haoxucu](https://github.com/haoxucu)
+
+* Reported that `netns-exec` was executable by all normal users ([fixed in `34a18f92`](https://github.com/fort-nix/nix-bitcoin/commit/34a18f92eeacc754e5857249aaf8decf24e98cde)); received 5% of the fund.
+* Reported that `lnd-create-macaroons` exposed the LND admin macaroon in `curl`'s process arguments ([fixed in `df184b6e`](https://github.com/fort-nix/nix-bitcoin/commit/df184b6e06cc3404add42ccf5ae68306395e8d6c)); received 10% of the fund.
+
+Both rewards were paid in transaction [`5b93fbad4b9a2c35daaf40b74fc76f0b69d2b75bc4da927cd3398dbc432eb888`](https://mempool.nixbitcoin.org/tx/5b93fbad4b9a2c35daaf40b74fc76f0b69d2b75bc4da927cd3398dbc432eb888).
 
 
 ## nix-bitcoin security fund

dev/README.md

@@ -97,5 +97,5 @@ It's easiest to use an existing service as a template:
   Most other services use packages that are already included in nixpkgs.
 
 ## Switching to a new NixOS release
-- Run command `update-flake.sh 25.11`
+- Run command `update-flake.sh 26.05`
 - Treewide: check if any `TODO-EXTERNAL` comments can be resolved

dev/dev.sh

@@ -82,6 +82,7 @@ read -rd '' src <<'EOF' || :
       inherit (nix-bitcoin.inputs) nixpkgs;
       # legacyInstallDirs = true;
       config = {
+        imports = [ ../test/lib/extra-container-workaround.nix ];
         containers.nb-adhoc = {
           # bindMounts."/shared" = { hostPath = "/my/hostpath"; isReadOnly = false; };
           extra.addressPrefix = "10.200.255";

examples/configuration.nix

@@ -324,7 +324,7 @@
   # this value at the release version of the first install of this system.
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "25.11"; # Did you read the comment?
+  system.stateVersion = "26.05"; # Did you read the comment?
 
   # The nix-bitcoin release version that your config is compatible with.
   # When upgrading to a backwards-incompatible release, nix-bitcoin will display an

examples/container/flake.nix

@@ -12,7 +12,7 @@
   inputs = {
     nix-bitcoin.url = "github:fort-nix/nix-bitcoin/release";
     # You can also use a version branch to track a specific NixOS release
-    # nix-bitcoin.url = "github:fort-nix/nix-bitcoin/nixos-25.11";
+    # nix-bitcoin.url = "github:fort-nix/nix-bitcoin/nixos-26.05";
 
     nixpkgs.follows = "nix-bitcoin/nixpkgs";
     nixpkgs-unstable.follows = "nix-bitcoin/nixpkgs-unstable";
@@ -31,6 +31,9 @@
         # legacyInstallDirs = true;
 
         config = {
+          # See the file for why this is needed and when it can be removed
+          imports = [ (nix-bitcoin.outPath + "/test/lib/extra-container-workaround.nix") ];
+
           containers.mynode = {
             # Always start container along with the container host
             autoStart = true;

examples/deploy-container.sh

@@ -75,6 +75,8 @@ fi
 #
 read -rd '' src <<EOF || true
 { pkgs, lib, ... }: {
+  imports = [ $(realpath "${BASH_SOURCE[0]%/*}"/../test/lib/extra-container-workaround.nix) ];
+
   containers.demo-node = {
     extra.addressPrefix = "10.250.0";
     extra.enableWAN = true;

examples/flakes/flake.nix

@@ -10,7 +10,7 @@
 
   inputs.nix-bitcoin.url = "github:fort-nix/nix-bitcoin/release";
   # You can also use a version branch to track a specific NixOS release
-  # inputs.nix-bitcoin.url = "github:fort-nix/nix-bitcoin/nixos-25.11";
+  # inputs.nix-bitcoin.url = "github:fort-nix/nix-bitcoin/nixos-26.05";
 
   inputs.nixpkgs.follows = "nix-bitcoin/nixpkgs";
   inputs.nixpkgs-unstable.follows = "nix-bitcoin/nixpkgs-unstable";

flake.lock

@@ -44,16 +44,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1782847189,
-        "narHash": "sha256-twXPFqFsrrY5r28Zh7Homgcp2gUMBgQ6WDS98Q/3xFI=",
+        "lastModified": 1786313170,
+        "narHash": "sha256-9BG7OgUWdu0ONDO5X2q6+K4bsuBITkX/3W4nNJu1Ito=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b6018f87da91d19d0ab4cf979885689b469cdd41",
+        "rev": "fcb8fcd6bf2d0adecae5bd491afaaaf8311b758d",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-25.11",
+        "ref": "nixos-26.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -76,11 +76,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1784453100,
-        "narHash": "sha256-zpGZb8FYui+i8KLtC0nlcmb0voR2zB80Qn8pe7lzIbk=",
+        "lastModified": 1786348146,
+        "narHash": "sha256-we5zDEFfn8TgzeWKjKDMIjeQZ59omEPl23NIF+13/ys=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b471514bed69eff5255c8e63c1f80e5fe56c616f",
+        "rev": "d482ef84049d9b7276b83a06e4e4d76983830097",
         "type": "github"
       },
       "original": {

flake.nix

@@ -5,7 +5,7 @@
   '';
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     nixpkgs-25_05.url = "github:NixOS/nixpkgs/nixos-25.05";
     flake-utils.url = "github:numtide/flake-utils";

helper/fetch-release

@@ -31,7 +31,7 @@ curl -fsS -L -O "$baseUrl/nar-hash.txt"
 curl -fsS -L -O "$baseUrl/nar-hash.txt.asc"
 
 # Verify signature for nar-hash
-gpg --verify nar-hash.txt.asc &> /dev/null || {
+gpg --verify nar-hash.txt.asc nar-hash.txt &> /dev/null || {
     >&2 echo "Error: Signature verification failed. Please open an issue in the project repository."
     exit 1
 }

modules/btcpayserver.nix

@@ -239,6 +239,11 @@ in {
             --datadir='${cfg.btcpayserver.dataDir}'
         '';
         User = cfg.btcpayserver.user;
+        # Since 2.4.0, btcpayserver uses `Host.CreateDefaultBuilder`, which sets the
+        # ASP.NET content root to the working directory instead of the app directory.
+        # The web root (`wwwroot`) is resolved relative to the content root, so
+        # btcpayserver must be started from its app directory.
+        WorkingDirectory = "${cfg.btcpayserver.package}/lib/btcpayserver";
         # Also restart after the program has exited successfully.
         # This is required to support restarting from the web interface after
         # interactive plugin installation.

modules/lnd.nix

@@ -265,13 +265,16 @@ in {
           curl = "${pkgs.curl}/bin/curl -fsS --cacert ${cfg.certPath}";
           restUrl = "https://${nbLib.addressWithPort cfg.restAddress cfg.restPort}/v1";
           # Setting macaroon permissions for other users needs root permissions
+          # The admin macaroon is passed to curl via a fd because argv is
+          # world-readable through /proc/<pid>/cmdline
           script = nbLib.rootScript "lnd-create-macaroons" ''
             umask ug=r,o=
             ${lib.concatMapStrings (macaroon: ''
               echo "Create custom macaroon ${macaroon}"
               macaroonPath="$RUNTIME_DIRECTORY/${macaroon}.macaroon"
+              adminMacaroonHex=$(${pkgs.xxd}/bin/xxd -ps -u -c 99999 '${networkDir}/admin.macaroon')
               ${curl} \
-                -H "Grpc-Metadata-macaroon: $(${pkgs.xxd}/bin/xxd -ps -u -c 99999 '${networkDir}/admin.macaroon')" \
+                -H @<(printf 'Grpc-Metadata-macaroon: %s\n' "$adminMacaroonHex") \
                 -X POST \
                 -d '{"permissions":[${cfg.macaroons.${macaroon}.permissions}]}' \
                 ${restUrl}/macaroon |\

modules/netns-isolation.nix

@@ -37,7 +37,6 @@ let
       type = types.str;
       description = ''
         User that is allowed to execute commands in the service network namespaces.
-        The user's group is also authorized.
       '';
       default = config.nix-bitcoin.operator.name;
     };
@@ -122,8 +121,10 @@ in {
       source = config.nix-bitcoin.pkgs.netns-exec;
       capabilities = "cap_sys_admin=ep";
       owner = cfg.allowedUser;
-      group = ""; # Set to the group of `owner`
-      permissions = "550";
+      # Don't authorize the group of `owner`. For normal users, this group is
+      # `users`, which is shared by all normal users.
+      group = "root";
+      permissions = "500";
     };
 
     systemd.services = {

pkgs/pinned.nix

@@ -4,18 +4,18 @@ pkgs: pkgsUnstable: pkgs-25_05:
   inherit (pkgs)
     bitcoin
     bitcoind
+    btcpayserver
     charge-lnd
+    clightning
     electrs
+    elementsd
     extra-container
     lightning-pool
     lndconnect;
 
   inherit (pkgsUnstable)
     bitcoind-knots
-    btcpayserver
     clboss
-    clightning
-    elementsd
     fulcrum
     lightning-loop
     lnd;

test/lib/extra-container-workaround.nix

@@ -0,0 +1,24 @@
+# FIXME:
+# Remove this file, along with the imports in ../../dev/dev.sh,
+# ../../examples/container/flake.nix, ../../examples/deploy-container.sh and
+# ./make-test.nix, as soon as extra-container declares these options itself
+# (https://github.com/erikarvstedt/extra-container/blob/master/eval-config.nix).
+#
+# extra-container evaluates the container host with a minimal module set to keep
+# eval times low. NixOS 26.05 added references to the following options to
+# `system/boot/systemd.nix`, which is part of that module set, while their
+# declaring modules are not.
+#
+# The defaults match the ones from the declaring modules. Like extra-container's
+# own dummy options, these declarations have no type because they only exist to
+# make host eval succeed. They don't affect the resulting container units.
+
+{ lib, pkgs, ... }: {
+  options = {
+    environment.variables = lib.mkOption { default = {}; };
+    i18n.imperativeLocale = lib.mkOption { default = false; };
+    services.openssh.enable = lib.mkOption { default = false; };
+    system.nixos-init.package = lib.mkOption { default = pkgs.nixos-init; };
+    time.timeZone = lib.mkOption { default = null; };
+  };
+}

test/lib/make-test.nix

@@ -22,8 +22,8 @@ let
       test.shellcheckServices.enable = true;
     };
 
-    testScript = nodes: let
-      cfg = nodes.nodes.machine;
+    testScript = { nodes, ... }: let
+      cfg = nodes.machine;
       data = {
         data = cfg.test.data;
         tests = cfg.tests;
@@ -56,12 +56,23 @@ let
     extra-container.lib.buildContainers {
       inherit system legacyInstallDirs;
       config = {
+        imports = [ ./extra-container-workaround.nix ];
+
         # The container name has a 11 char length limit
         containers.nb-test = { config, ... }: {
           imports = [
             {
               config = {
-                extra = config.config.test.container;
+                extra = {
+                  # Defined here instead of in the container config because NixOS
+                  # 26.05 derives the container's `networking.interfaces` from
+                  # `localAddress`, which extra-container derives from
+                  # `addressPrefix`. Reading it from the container config would
+                  # thus be circular.
+                  addressPrefix = "10.225.255";
+                  inherit (config.config.test.container)
+                    enableWAN firewallAllowHost exposeLocalhost;
+                };
                 config = testConfig;
               };
             }
@@ -117,8 +128,9 @@ let
       # Needed because duplicity requires 270 MB of free temp space, regardless of backup size
       diskSize = 1024;
 
-      # Min. 800 MiB needed to avoid 'out of memory' errors
-      memorySize = lib.mkDefault 2048;
+      # The `netns` scenarios need more than 2 GiB: netns-isolation adds a
+      # network namespace per service, which costs a few hundred MiB of slab.
+      memorySize = lib.mkDefault 4096;
 
       # There are no perf gains beyond 3 cores.
       # Benchmark: Ryzen 7 2700 (8 cores), VM test `default` as of 34f6eb90.

test/lib/test-lib.nix

@@ -31,7 +31,7 @@ with lib;
       container = {
         # Forwarded to extra-container. For descriptions, see
         # https://github.com/erikarvstedt/extra-container/blob/master/eval-config.nix
-        addressPrefix = mkOption { default = "10.225.255"; };
+        # `addressPrefix` is not settable here, see ./make-test.nix.
         enableWAN = mkOption { default = false; };
         firewallAllowHost = mkOption { default = true; };
         exposeLocalhost = mkOption { default = false; };

test/nixos-search/flake.lock

@@ -1,31 +1,49 @@
 {
   "nodes": {
-    "flake-utils": {
+    "flake-parts": {
       "inputs": {
-        "systems": "systems"
+        "nixpkgs-lib": [
+          "nixos-search",
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "lastModified": 1785627969,
+        "narHash": "sha256-4dtXQk/NMePegK/nWp5NSeuZKLATItOq61lpEvmXqGw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "427bf4bd9435fdf21321c8cc628c24efc14c0f7a",
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-schemas": {
+      "locked": {
+        "lastModified": 1780327564,
+        "narHash": "sha256-HiRPtA0spK+Dkgbhz/1zW9glXxNVB+L4Rj2VYmdawb8=",
+        "owner": "DeterminateSystems",
+        "repo": "flake-schemas",
+        "rev": "6cc9bd98891b1fc6bb2b8cb3277df8bc72799ca6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "DeterminateSystems",
+        "repo": "flake-schemas",
         "type": "github"
       }
     },
     "nixos-infra": {
       "flake": false,
       "locked": {
-        "lastModified": 1778186763,
-        "narHash": "sha256-WYpwAXUSbAvyygzaPJ5A0MpBgCRDfOn/JlA6bhAExOM=",
+        "lastModified": 1785876137,
+        "narHash": "sha256-maIa1tcvLYFyedzvWApdpaMLzDyTWktCXeugLOEZzDs=",
         "owner": "NixOS",
         "repo": "infra",
-        "rev": "f7fcb33b303e1026a99206c8a9a4f4d93907d5d1",
+        "rev": "952d0cfaf5d2ae350f9a2746c61e03d53a15b8db",
         "type": "github"
       },
       "original": {
@@ -36,19 +54,19 @@
     },
     "nixos-search": {
       "inputs": {
-        "flake-utils": "flake-utils",
+        "flake-parts": "flake-parts",
+        "flake-schemas": "flake-schemas",
         "nixos-infra": "nixos-infra",
         "nixpkgs": "nixpkgs",
-        "nixpkgs-npmlock2nix": "nixpkgs-npmlock2nix",
-        "npmlock2nix": "npmlock2nix",
+        "systems": "systems",
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1778708793,
-        "narHash": "sha256-LXzXKjaxm23vLEOVefy9HNfedZvdI/FvoJlFd/jjNc0=",
+        "lastModified": 1786265380,
+        "narHash": "sha256-JX5Q9o03xYMUpAoHB4nz/0Pf3SeL7GrXoKKJhkUMNps=",
         "owner": "nixos",
         "repo": "nixos-search",
-        "rev": "4a3cb26d1ccaa9c62f29071c228dff07c3686e38",
+        "rev": "7507fd6accc65981f02f66f5c6c328e09efc1221",
         "type": "github"
       },
       "original": {
@@ -59,50 +77,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1777954456,
-        "narHash": "sha256-hGdgeU2Nk87RAuZyYjyDjFL6LK7dAZN5RE9+hrDTkDU=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "549bd84d6279f9852cae6225e372cc67fb91a4c1",
-        "type": "github"
+        "lastModified": 1785967620,
+        "narHash": "sha256-929m7iW8q2uv3mZHNwY8Um6XKj99rbIcZsWS9cT1vaI=",
+        "rev": "b7c2ada94fe99c15b0dbcf4d11fd7850b957a436",
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixos/unstable/nixos-26.11pre1048607.b7c2ada94fe9/nixexprs.tar.xz"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-npmlock2nix": {
-      "locked": {
-        "lastModified": 1636623366,
-        "narHash": "sha256-jOQMlv9qFSj0U66HB+ujZoapty0UbewmSNbX8+3ujUQ=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "c5ed8beb478a8ca035f033f659b60c89500a3034",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "c5ed8beb478a8ca035f033f659b60c89500a3034",
-        "type": "github"
-      }
-    },
-    "npmlock2nix": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1758100811,
-        "narHash": "sha256-qJc3ffjHVXUdZqytKcDK9XZ2b3BQ1RdYfZFuYgxbrn4=",
-        "owner": "nix-community",
-        "repo": "npmlock2nix",
-        "rev": "4d9060afbaa5f57ee0b8ef11c7044ed287a7d302",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "npmlock2nix",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz"
       }
     },
     "root": {
@@ -111,6 +94,7 @@
       }
     },
     "systems": {
+      "flake": false,
       "locked": {
         "lastModified": 1681028828,
         "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
@@ -133,11 +117,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1775636079,
-        "narHash": "sha256-pc20NRoMdiar8oPQceQT47UUZMBTiMdUuWrYu2obUP0=",
+        "lastModified": 1785945821,
+        "narHash": "sha256-NLSyTCW4K4ofhNBllt3omPasm6QpralXH1DBZOc91Dw=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "790751ff7fd3801feeaf96d7dc416a8d581265ba",
+        "rev": "ae7910970dddc408fe6ab1c8e4b277bb21d72dc0",
         "type": "github"
       },
       "original": {

test/run-tests.sh

@@ -332,7 +332,13 @@ all() {
     shellcheck
     examples
     flake
-    nixosSearch
+    # FIXME: Re-enable when the nixos-search input is usable again.
+    # flake-info at the currently locked rev supplies nixpkgs to its inner eval
+    # via `builtins.getFlake` instead of NIX_PATH. This breaks the postPatch in
+    # ./nixos-search/flake.nix and both runners in ./nixos-search, which pass
+    # nix-bitcoin's pinned nixpkgs through NIX_PATH.
+    # Run explicitly with `./run-tests.sh nixosSearch`.
+    # nixosSearch
 }
 
 # An alias for buildTest

test/tests.nix

@@ -279,6 +279,10 @@ let
       test.data.netns = config.nix-bitcoin.netns-isolation.netns;
       tests.netns-isolation = true;
       environment.systemPackages = [ pkgs.fping ];
+
+      # Used for testing that `netns-exec` is not executable by users other than
+      # the operator. Like all normal users, this user is a member of group `users`.
+      users.users.unauthorized.isNormalUser = true;
     };
 
     regtestBase = { config, pkgs, ... }: {

test/tests.py

@@ -1,5 +1,6 @@
 from collections import OrderedDict
 import json
+import os
 import re
 
 def succeed(*cmds):
@@ -331,6 +332,21 @@ def _():
         f"nc -l {ip('bitcoind')} 1080 2>&1 || true", "nc: Cannot assign requested address"
     )
 
+    # netns-exec should fail for unauthorized namespaces
+    assert_matches(
+        "runuser -u operator -- netns-exec nb-clightning ip a 2>&1 || true",
+        "nb-clightning is not an allowed netns",
+    )
+
+    # netns-exec should only be executable by the operator user.
+    # User `unauthorized` is a member of group `users`, like all normal users.
+    # Netns `nb-clightning` is rejected by netns-exec before it accesses the
+    # netns, so the error below can only originate from the exec permissions.
+    assert_matches(
+        "runuser -u unauthorized -- netns-exec nb-clightning ip a 2>&1 || true",
+        "Permission denied",
+    )
+
     if "joinmarket" in enabled_tests:
         # netns-exec should drop capabilities
         assert_matches(
@@ -338,13 +354,6 @@ def _():
             re.compile("^Current: =$", re.MULTILINE),
         )
 
-    if "clightning" in enabled_tests:
-        # netns-exec should fail for unauthorized namespaces
-        machine.fail("netns-exec nb-clightning ip a")
-
-        # netns-exec should only be executable by the operator user
-        machine.fail("runuser -u clightning -- netns-exec nb-bitcoind ip a")
-
 
 # Impure: stops bitcoind (and dependent services)
 @test("backups")