Bump all nix dependencies

[kp-samuel-tam]

Description

Previously:

Since expressvpn/wolfssl-rs#324 has been merged and propagated to here, now we can bump flake.lock and new nix builds should work fine.

Now I am just bumping nix stuff from September last year to March this year.

Flake lock file updates:

• Updated input 'flake-parts': 2025-09-01 → 2026-03-01
• Updated input 'flake-parts/nixpkgs-lib': 2025-08-10 → 2026-03-01
• Updated input 'nixpkgs': 2025-09-12 → 2026-03-04
• Updated input 'rust-overlay': 2026-02-19 → 2026-03-04

Motivation and Context

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• The correct base branch is being used, if not main

[github-actions]

Code coverage summary for 065d9ca:

Filename                                                     Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
lightway-app-utils/src/args/cipher.rs                              5                 5     0.00%           1                 1     0.00%           5                 5     0.00%           0                 0         -
lightway-app-utils/src/args/connection_type.rs                     5                 5     0.00%           1                 1     0.00%           5                 5     0.00%           0                 0         -
lightway-app-utils/src/args/duration.rs                           22                18    18.18%           5                 4    20.00%          15                12    20.00%           0                 0         -
lightway-app-utils/src/args/ip_map.rs                             19                19     0.00%           3                 3     0.00%          13                13     0.00%           0                 0         -
lightway-app-utils/src/args/logging.rs                            37                37     0.00%           3                 3     0.00%          31                31     0.00%           0                 0         -
lightway-app-utils/src/args/nonzero_duration.rs                   24                16    33.33%           4                 3    25.00%          16                10    37.50%           0                 0         -
lightway-app-utils/src/connection_ticker.rs                      229                17    92.58%          28                 4    85.71%         126                15    88.10%           0                 0         -
lightway-app-utils/src/dplpmtud_timer.rs                         209                13    93.78%          22                 4    81.82%         117                11    90.60%           0                 0         -
lightway-app-utils/src/event_stream.rs                            19                 0   100.00%           3                 0   100.00%          11                 0   100.00%           0                 0         -
lightway-app-utils/src/sockopt/ip_mtu_discover.rs                 77                77     0.00%           6                 6     0.00%          68                68     0.00%           0                 0         -
lightway-app-utils/src/sockopt/ip_pktinfo.rs                      14                14     0.00%           1                 1     0.00%          16                16     0.00%           0                 0         -
lightway-app-utils/src/tun.rs                                    281               281     0.00%          31                31     0.00%         175               175     0.00%           0                 0         -
lightway-app-utils/src/utils.rs                                   21                21     0.00%           1                 1     0.00%          11                11     0.00%           0                 0         -
lightway-client/src/args.rs                                       35                14    60.00%           2                 1    50.00%          17                 8    52.94%           0                 0         -
lightway-client/src/dns_manager.rs                                15                15     0.00%           3                 3     0.00%          11                11     0.00%           0                 0         -
lightway-client/src/io/inside/tun.rs                              78                78     0.00%          11                11     0.00%          57                57     0.00%           0                 0         -
lightway-client/src/io/outside/tcp.rs                             80                80     0.00%          11                11     0.00%          48                48     0.00%           0                 0         -
lightway-client/src/io/outside/udp.rs                            121               121     0.00%          13                13     0.00%          74                74     0.00%           0                 0         -
lightway-client/src/keepalive.rs                                 615                44    92.85%          55                 6    89.09%         330                25    92.42%           0                 0         -
lightway-client/src/lib.rs                                       746               610    18.23%          57                46    19.30%         535               445    16.82%           0                 0         -
lightway-client/src/main.rs                                      181               181     0.00%          11                11     0.00%         146               146     0.00%           0                 0         -
lightway-client/src/platform/linux/dns_manager.rs                141                63    55.32%          16                 6    62.50%          93                40    56.99%           0                 0         -
lightway-client/src/route_manager.rs                            1190               210    82.35%          77                 8    89.61%         663               116    82.50%           0                 0         -
lightway-core/src/borrowed_bytesmut.rs                           373                 0   100.00%          24                 0   100.00%         185                 0   100.00%           0                 0         -
lightway-core/src/builder_predicates.rs                           24                12    50.00%           4                 2    50.00%          24                12    50.00%           0                 0         -
lightway-core/src/cipher.rs                                       13                 0   100.00%           2                 0   100.00%          10                 0   100.00%           0                 0         -
lightway-core/src/connection.rs                                 1602               785    51.00%          71                26    63.38%        1129               523    53.68%           0                 0         -
lightway-core/src/connection/builders.rs                         238                46    80.67%          21                 8    61.90%         247                53    78.54%           0                 0         -
lightway-core/src/connection/dplpmtud.rs                        1741                81    95.35%          63                 0   100.00%         830                 7    99.16%           0                 0         -
lightway-core/src/connection/fragment_map.rs                     366                 6    98.36%          25                 0   100.00%         254                 3    98.82%           0                 0         -
lightway-core/src/connection/io_adapter.rs                       526                23    95.63%          34                 5    85.29%         276                21    92.39%           0                 0         -
lightway-core/src/connection/key_update.rs                        34                13    61.76%           5                 0   100.00%          38                19    50.00%           0                 0         -
lightway-core/src/context.rs                                     202                45    77.72%          26                 9    65.38%         213                52    75.59%           0                 0         -
lightway-core/src/context/ip_pool.rs                               8                 3    62.50%           1                 0   100.00%           5                 0   100.00%           0                 0         -
lightway-core/src/context/server_auth.rs                          32                24    25.00%           4                 3    25.00%          24                20    16.67%           0                 0         -
lightway-core/src/encoding_request_states.rs                       3                 0   100.00%           1                 0   100.00%           3                 0   100.00%           0                 0         -
lightway-core/src/io.rs                                           10                10     0.00%           3                 3     0.00%           9                 9     0.00%           0                 0         -
lightway-core/src/lib.rs                                           9                 0   100.00%           3                 0   100.00%           9                 0   100.00%           0                 0         -
lightway-core/src/metrics.rs                                      51                41    19.61%          21                17    19.05%          48                38    20.83%           0                 0         -
lightway-core/src/packet.rs                                       38                10    73.68%           4                 1    75.00%          30                 6    80.00%           0                 0         -
lightway-core/src/plugin.rs                                      303                13    95.71%          21                 3    85.71%         145                 7    95.17%           0                 0         -
lightway-core/src/utils.rs                                       334                26    92.22%          22                 2    90.91%         165                17    89.70%           0                 0         -
lightway-core/src/version.rs                                      93                 0   100.00%          17                 0   100.00%          82                 0   100.00%           0                 0         -
lightway-core/src/wire.rs                                        434                39    91.01%          28                 0   100.00%         232                 9    96.12%           0                 0         -
lightway-core/src/wire/auth_failure.rs                            27                 1    96.30%           3                 0   100.00%          17                 0   100.00%           0                 0         -
lightway-core/src/wire/auth_request.rs                           472                12    97.46%          26                 0   100.00%         241                 0   100.00%           0                 0         -
lightway-core/src/wire/auth_success_with_config_ipv4.rs          222                 3    98.65%          11                 0   100.00%         124                 0   100.00%           0                 0         -
lightway-core/src/wire/data.rs                                    51                 1    98.04%           5                 0   100.00%          33                 0   100.00%           0                 0         -
lightway-core/src/wire/data_frag.rs                              127                 1    99.21%          14                 0   100.00%          80                 0   100.00%           0                 0         -
lightway-core/src/wire/encoding_request.rs                        82                 2    97.56%           6                 0   100.00%          42                 1    97.62%           0                 0         -
lightway-core/src/wire/encoding_response.rs                       82                 2    97.56%           6                 0   100.00%          42                 1    97.62%           0                 0         -
lightway-core/src/wire/expresslane_config.rs                     166                 1    99.40%           8                 0   100.00%          92                 0   100.00%           0                 0         -
lightway-core/src/wire/expresslane_data.rs                       994                50    94.97%          39                 4    89.74%         498                27    94.58%           0                 0         -
lightway-core/src/wire/ping.rs                                    95                 2    97.89%           7                 0   100.00%          59                 0   100.00%           0                 0         -
lightway-core/src/wire/pong.rs                                   109                 2    98.17%           8                 0   100.00%          72                 0   100.00%           0                 0         -
lightway-core/src/wire/server_config.rs                           69                 2    97.10%           4                 0   100.00%          37                 0   100.00%           0                 0         -
lightway-server/src/auth.rs                                      273                49    82.05%          22                 6    72.73%         171                28    83.63%           0                 0         -
lightway-server/src/connection.rs                                137               137     0.00%          11                11     0.00%         110               110     0.00%           0                 0         -
lightway-server/src/connection_manager.rs                        326               326     0.00%          39                39     0.00%         275               275     0.00%           0                 0         -
lightway-server/src/connection_manager/connection_map.rs         407                20    95.09%          21                 1    95.24%         228                 8    96.49%           0                 0         -
lightway-server/src/io/inside/tun.rs                              44                44     0.00%           9                 9     0.00%          30                30     0.00%           0                 0         -
lightway-server/src/io/outside/tcp.rs                             90                90     0.00%           9                 9     0.00%          65                65     0.00%           0                 0         -
lightway-server/src/io/outside/udp.rs                            316               316     0.00%          16                16     0.00%         205               205     0.00%           0                 0         -
lightway-server/src/io/outside/udp/cmsg.rs                       197                53    73.10%          14                 5    64.29%         158                43    72.78%           0                 0         -
lightway-server/src/ip_manager.rs                                542                50    90.77%          22                 4    81.82%         242                23    90.50%           0                 0         -
lightway-server/src/ip_manager/ip_pool.rs                        540                 0   100.00%          27                 0   100.00%         252                 0   100.00%           0                 0         -
lightway-server/src/lib.rs                                       251               251     0.00%          14                14     0.00%         169               169     0.00%           0                 0         -
lightway-server/src/main.rs                                      218               218     0.00%          10                10     0.00%         120               120     0.00%           0                 0         -
lightway-server/src/metrics.rs                                   254               250     1.57%          85                83     2.35%         215               211     1.86%           0                 0         -
lightway-server/src/statistics.rs                                132                59    55.30%           8                 4    50.00%          86                35    59.30%           0                 0         -
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                                          16821              5058    69.93%        1209               472    60.96%       10204              3489    65.81%           0                 0         -

✅ Region coverage 69% passes
✅ Line coverage 65% passes

[kp-samuel-tam]

Bump again because it's March now.

[kp-mariappan-ramasamy]

@kp-samuel-tam Would you mind adding a CI to update it periodically in this PR ?

[kp-samuel-tam]

I think testing went okay, nix install actions and nix flake update seemed to do its job. https://github.com/expressvpn/lightway/actions/runs/22667901823/job/65704205984