diff --git a/pkgs/applications/audio/psst/Cargo.lock b/pkgs/applications/audio/psst/Cargo.lock
index 6ef92630caf9..b8a5524665aa 100644
--- a/pkgs/applications/audio/psst/Cargo.lock
+++ b/pkgs/applications/audio/psst/Cargo.lock
@@ -49,6 +49,12 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4aa90d7ce82d4be67b64039a3d588d38dbcc6736577de4a847025ce5b0c468d1"
 
+[[package]]
+name = "allocator-api2"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c6cb57a04249c6480766f7f7cef5467412af1490f8d1e243141daddada3264f"
+
 [[package]]
 name = "alsa"
 version = "0.9.1"
@@ -250,7 +256,7 @@ dependencies = [
  "futures-lite 2.3.0",
  "parking",
  "polling 3.7.3",
- "rustix 0.38.35",
+ "rustix 0.38.37",
  "slab",
  "tracing",
  "windows-sys 0.59.0",
@@ -289,7 +295,7 @@ dependencies = [
  "cfg-if",
  "event-listener 3.1.0",
  "futures-lite 1.13.0",
- "rustix 0.38.35",
+ "rustix 0.38.37",
  "windows-sys 0.48.0",
 ]
 
@@ -316,7 +322,7 @@ dependencies = [
  "cfg-if",
  "futures-core",
  "futures-io",
- "rustix 0.38.35",
+ "rustix 0.38.37",
  "signal-hook-registry",
  "slab",
  "windows-sys 0.59.0",
@@ -513,15 +519,6 @@ dependencies = [
  "generic-array",
 ]
 
-[[package]]
-name = "block2"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c132eebf10f5cad5289222520a4a058514204aed6d791f1cf4fe8088b82d15f"
-dependencies = [
- "objc2",
-]
-
 [[package]]
 name = "blocking"
 version = "1.6.1"
@@ -1011,24 +1008,24 @@ dependencies = [
 ]
 
 [[package]]
-name = "dirs-next"
-version = "1.0.2"
+name = "directories"
+version = "5.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf36e65a80337bea855cd4ef9b8401ffce06a7baedf2e85ec467b1ac3f6e82b6"
+checksum = "9a49173b84e034382284f27f1af4dcbbd231ffa358c0fe316541a7337f376a35"
 dependencies = [
- "cfg-if",
- "dirs-sys-next",
+ "dirs-sys",
 ]
 
 [[package]]
-name = "dirs-sys-next"
-version = "0.1.2"
+name = "dirs-sys"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+checksum = "520f05a5cbd335fae5a99ff7a6ab8627577660ee5cfd6a94a6a929b52ff0321c"
 dependencies = [
  "libc",
+ "option-ext",
  "redox_users",
- "winapi",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -1365,6 +1362,12 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
+[[package]]
+name = "foldhash"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f81ec6369c545a7d40e4589b5597581fa1c441fe1cce96dd1de43159910a36a2"
+
 [[package]]
 name = "foreign-types"
 version = "0.3.2"
@@ -1389,12 +1392,6 @@ dependencies = [
  "percent-encoding",
 ]
 
-[[package]]
-name = "fs_extra"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
-
 [[package]]
 name = "futf"
 version = "0.1.5"
@@ -2033,6 +2030,17 @@ version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
 
+[[package]]
+name = "hashbrown"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
+dependencies = [
+ "allocator-api2",
+ "equivalent",
+ "foldhash",
+]
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -2246,9 +2254,9 @@ dependencies = [
 
 [[package]]
 name = "image"
-version = "0.25.2"
+version = "0.25.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99314c8a2152b8ddb211f924cdae532d8c5e4c8bb54728e12fff1b0cd5963a10"
+checksum = "bc144d44a31d753b02ce64093d532f55ff8dc4ebf2ffb8a63c0dda691385acae"
 dependencies = [
  "bytemuck",
  "byteorder-lite",
@@ -2269,9 +2277,9 @@ dependencies = [
 
 [[package]]
 name = "image-webp"
-version = "0.1.3"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f79afb8cbee2ef20f59ccd477a218c12a93943d075b492015ecb1bb81f8ee904"
+checksum = "e031e8e3d94711a9ccb5d6ea357439ef3dcbed361798bd4071dc4d9793fbe22f"
 dependencies = [
  "byteorder-lite",
  "quick-error",
@@ -2290,7 +2298,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.14.5",
 ]
 
 [[package]]
@@ -2573,12 +2581,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "linked-hash-map"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
-
 [[package]]
 name = "linux-raw-sys"
 version = "0.3.8"
@@ -2617,12 +2619,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "lru-cache"
-version = "0.1.2"
+name = "lru"
+version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31e24f1ad8321ca0e8a1e0ac13f23cb668e6f5466c2c57319f6a5cf1cc8e3b1c"
+checksum = "234cf4f4a04dc1f57e24b96cc0cd600cf2af460d4161ac5ecdd0af8e1f3b2a38"
 dependencies = [
- "linked-hash-map",
+ "hashbrown 0.15.0",
 ]
 
 [[package]]
@@ -2936,6 +2938,15 @@ dependencies = [
  "syn 2.0.77",
 ]
 
+[[package]]
+name = "num_threads"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c7398b9c8b70908f6371f47ed36737907c87c52af34c268fed0bf0ceb92ead9"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "oauth2"
 version = "4.4.2"
@@ -2965,40 +2976,6 @@ dependencies = [
  "malloc_buf",
 ]
 
-[[package]]
-name = "objc-sys"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdb91bdd390c7ce1a8607f35f3ca7151b65afc0ff5ff3b34fa350f7d7c7e4310"
-
-[[package]]
-name = "objc2"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46a785d4eeff09c14c487497c162e92766fbb3e4059a71840cecc03d9a50b804"
-dependencies = [
- "objc-sys",
- "objc2-encode",
-]
-
-[[package]]
-name = "objc2-encode"
-version = "4.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7891e71393cd1f227313c9379a26a584ff3d7e6e7159e988851f0934c993f0f8"
-
-[[package]]
-name = "objc2-foundation"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ee638a5da3799329310ad4cfa62fbf045d5f56e3ef5ba4149e7452dcf89d5a8"
-dependencies = [
- "bitflags 2.6.0",
- "block2",
- "libc",
- "objc2",
-]
-
 [[package]]
 name = "object"
 version = "0.36.4"
@@ -3033,9 +3010,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.19.0"
+version = "1.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
 
 [[package]]
 name = "open"
@@ -3048,6 +3025,12 @@ dependencies = [
  "pathdiff",
 ]
 
+[[package]]
+name = "option-ext"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
+
 [[package]]
 name = "ordered-stream"
 version = "0.2.0"
@@ -3337,15 +3320,6 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
-[[package]]
-name = "platform-dirs"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e188d043c1a692985f78b5464853a263f1a27e5bd6322bad3a4078ee3c998a38"
-dependencies = [
- "dirs-next",
-]
-
 [[package]]
 name = "png"
 version = "0.17.13"
@@ -3385,7 +3359,7 @@ dependencies = [
  "concurrent-queue",
  "hermit-abi 0.4.0",
  "pin-project-lite",
- "rustix 0.38.35",
+ "rustix 0.38.37",
  "tracing",
  "windows-sys 0.59.0",
 ]
@@ -3510,7 +3484,6 @@ dependencies = [
  "aes",
  "audio_thread_priority",
  "byteorder",
- "chrono",
  "cpal",
  "crossbeam-channel",
  "ctr",
@@ -3537,6 +3510,7 @@ dependencies = [
  "socks",
  "symphonia",
  "tempfile",
+ "time",
  "ureq",
  "url",
  "windows 0.58.0",
@@ -3547,19 +3521,18 @@ name = "psst-gui"
 version = "0.1.0"
 dependencies = [
  "crossbeam-channel",
+ "directories",
  "druid",
  "druid-enums",
  "druid-shell",
  "env_logger",
- "fs_extra",
- "image 0.25.2",
+ "image 0.25.4",
  "itertools 0.13.0",
  "log",
- "lru-cache",
+ "lru",
  "once_cell",
  "open",
  "parking_lot",
- "platform-dirs",
  "psst-core",
  "rand",
  "raw-window-handle",
@@ -3573,7 +3546,6 @@ dependencies = [
  "time-humanize",
  "ureq",
  "url",
- "webbrowser",
  "winres",
 ]
 
@@ -3765,9 +3737,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.10.6"
+version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4219d74c6b67a3654a9fbebc4b419e22126d13d2f3c4a07ee0cb61ff79a79619"
+checksum = "38200e5ee88914975b69f657f0801b6f6dccafd44fd9326302a4aaeecfacb1d8"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -3777,9 +3749,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38caf58cc5ef2fed281f89292ef23f6365465ed9a41b7a7754eb4e26496c92df"
+checksum = "368758f23274712b504848e9d5a6f010445cc8b87a7cdb4d7cbee666c1288da3"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -3788,9 +3760,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a66a03ae7c801facd77a29370b4faec201768915ac14a721ba36f20bc9c209b"
+checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
 name = "reqwest"
@@ -3838,9 +3810,6 @@ name = "rgb"
 version = "0.8.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57397d16646700483b67d2dd6511d79318f9d057fdbd21a4066aeac8b41d310a"
-dependencies = [
- "bytemuck",
-]
 
 [[package]]
 name = "ring"
@@ -3894,9 +3863,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.35"
+version = "0.38.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a85d50532239da68e9addb745ba38ff4612a242c1c7ceea689c4bc7c2f43c36f"
+checksum = "8acb788b847c24f28525660c4d7758620a7210875711f79e7f663cc152726811"
 dependencies = [
  "bitflags 2.6.0",
  "errno",
@@ -4034,18 +4003,18 @@ checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 
 [[package]]
 name = "serde"
-version = "1.0.209"
+version = "1.0.210"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99fce0ffe7310761ca6bf9faf5115afbc19688edd00171d81b1bb1b116c63e09"
+checksum = "c8e3592472072e6e22e0a54d5904d9febf8508f65fb8552499a1abc7d1078c3a"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.209"
+version = "1.0.210"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5831b979fd7b5439637af1752d535ff49f4860c0f341d1baeb6faf0f4242170"
+checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4054,9 +4023,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.127"
+version = "1.0.132"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8043c06d9f82bd7271361ed64f415fe5e12a77fdb52e573e7f06a516dea329ad"
+checksum = "d726bfaff4b320266d395898905d0eba0345aae23b54aee3a737e260fd46db03"
 dependencies = [
  "itoa",
  "memchr",
@@ -4474,14 +4443,14 @@ checksum = "61c41af27dd6d1e27b1b16b489db798443478cef1f06a660c96db617ba5de3b1"
 
 [[package]]
 name = "tempfile"
-version = "3.12.0"
+version = "3.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04cbcdd0c794ebb0d4cf35e88edd2f7d2c4c3e9a5a6dab322839b321c6a87a64"
+checksum = "f0f2c9fc62d0beef6951ccffd757e241266a2c833136efbe35af6cd2567dca5b"
 dependencies = [
  "cfg-if",
  "fastrand 2.1.1",
  "once_cell",
- "rustix 0.38.35",
+ "rustix 0.38.37",
  "windows-sys 0.59.0",
 ]
 
@@ -4554,7 +4523,9 @@ checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
 dependencies = [
  "deranged",
  "itoa",
+ "libc",
  "num-conv",
+ "num_threads",
  "powerfmt",
  "serde",
  "time-core",
@@ -5079,24 +5050,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "webbrowser"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "425ba64c1e13b1c6e8c5d2541c8fac10022ca584f33da781db01b5756aef1f4e"
-dependencies = [
- "block2",
- "core-foundation",
- "home",
- "jni",
- "log",
- "ndk-context",
- "objc2",
- "objc2-foundation",
- "url",
- "web-sys",
-]
-
 [[package]]
 name = "webpki-roots"
 version = "0.25.4"
diff --git a/pkgs/applications/audio/psst/default.nix b/pkgs/applications/audio/psst/default.nix
index af5b7a51f999..24dad343fc54 100644
--- a/pkgs/applications/audio/psst/default.nix
+++ b/pkgs/applications/audio/psst/default.nix
@@ -16,13 +16,13 @@ let
 in
 rustPlatform.buildRustPackage rec {
   pname = "psst";
-  version = "unstable-2024-10-07";
+  version = "unstable-2024-10-24";
 
   src = fetchFromGitHub {
     owner = "jpochyla";
     repo = pname;
-    rev = "38d1c75d59848c54cb88896a93e05da3c71c7df4";
-    hash = "sha256-iMtrZ1Mto3j4lFXI2Sm2R85+m8LpR7V1WoJ3X5JyF60=";
+    rev = "02923198ba0e27b2b6271340cf57dd8ce109049b";
+    hash = "sha256-gEK0yf37eREsI6kCIYTBlkkM6Fnjy0KGnd0XqcawGjU=";
   };
 
   cargoLock = {
diff --git a/pkgs/applications/audio/psst/make-build-reproducible.patch b/pkgs/applications/audio/psst/make-build-reproducible.patch
index edaf46af94ab..0e4f3c75a89e 100644
--- a/pkgs/applications/audio/psst/make-build-reproducible.patch
+++ b/pkgs/applications/audio/psst/make-build-reproducible.patch
@@ -1,20 +1,22 @@
 diff --git a/psst-core/build.rs b/psst-core/build.rs
 deleted file mode 100644
-index cac2c23..0000000
+index 4e899af..0000000
 --- a/psst-core/build.rs
 +++ /dev/null
-@@ -1,41 +0,0 @@
+@@ -1,43 +0,0 @@
+-use gix_config::File;
 -use std::{env, fs, io::Write};
+-use time::OffsetDateTime;
 -
 -fn main() {
 -    let outdir = env::var("OUT_DIR").unwrap();
 -    let outfile = format!("{}/build-time.txt", outdir);
 -
 -    let mut fh = fs::File::create(outfile).unwrap();
--    write!(fh, r#""{}""#, chrono::Local::now()).ok();
+-    let now = OffsetDateTime::now_local().unwrap_or_else(|_| OffsetDateTime::now_utc());
+-    write!(fh, r#""{}""#, now).ok();
 -
--    let git_config =
--        gix_config::File::from_git_dir("../.git/".into()).expect("Git Config not found!");
+-    let git_config = File::from_git_dir("../.git/".into()).expect("Git Config not found!");
 -    // Get Git's 'Origin' URL
 -    let mut remote_url = git_config
 -        .raw_value("remote.origin.url")
@@ -46,7 +48,7 @@ index cac2c23..0000000
 -    write!(file, r#""{}""#, remote_url).ok();
 -}
 diff --git a/psst-core/src/lib.rs b/psst-core/src/lib.rs
-index 2faa317..7d7501d 100644
+index 2faa317..b890a2d 100644
 --- a/psst-core/src/lib.rs
 +++ b/psst-core/src/lib.rs
 @@ -2,9 +2,9 @@
@@ -56,7 +58,7 @@ index 2faa317..7d7501d 100644
 -pub const GIT_VERSION: &str = git_version!();
 -pub const BUILD_TIME: &str = include!(concat!(env!("OUT_DIR"), "/build-time.txt"));
 -pub const REMOTE_URL: &str = include!(concat!(env!("OUT_DIR"), "/remote-url.txt"));
-+pub const GIT_VERSION: &str = "38d1c75d59848c54cb88896a93e05da3c71c7df4";
++pub const GIT_VERSION: &str = "02923198ba0e27b2b6271340cf57dd8ce109049b";
 +pub const BUILD_TIME: &str = "1970-01-01 00:00:00";
 +pub const REMOTE_URL: &str = "https://github.com/jpochyla/psst";
  
diff --git a/pkgs/development/cuda-modules/cuda-library-samples/generic.nix b/pkgs/development/cuda-modules/cuda-library-samples/generic.nix
index f5d1c250cfca..43d2bece88c9 100644
--- a/pkgs/development/cuda-modules/cuda-library-samples/generic.nix
+++ b/pkgs/development/cuda-modules/cuda-library-samples/generic.nix
@@ -36,6 +36,7 @@ let
         cuSPARSE, cuSOLVER, cuFFT, cuRAND, NPP and nvJPEG.
       '';
       license = lib.licenses.bsd3;
+      platforms = [ "x86_64-linux" ];
       maintainers = with lib.maintainers; [ obsidian-systems-maintenance ] ++ lib.teams.cuda.members;
     };
   };
diff --git a/pkgs/development/cuda-modules/cuda-samples/generic.nix b/pkgs/development/cuda-modules/cuda-samples/generic.nix
index ed9c57f3d00c..97e05957d3ed 100644
--- a/pkgs/development/cuda-modules/cuda-samples/generic.nix
+++ b/pkgs/development/cuda-modules/cuda-samples/generic.nix
@@ -73,6 +73,7 @@ backendStdenv.mkDerivation (finalAttrs: {
     description = "Samples for CUDA Developers which demonstrates features in CUDA Toolkit";
     # CUDA itself is proprietary, but these sample apps are not.
     license = lib.licenses.bsd3;
+    platforms = [ "x86_64-linux" ];
     maintainers = with lib.maintainers; [ obsidian-systems-maintenance ] ++ lib.teams.cuda.members;
   };
 })
diff --git a/pkgs/test/build-environment-info/default.nix b/pkgs/test/build-environment-info/default.nix
index f0c71d8d1eaf..dce91edbf4d1 100644
--- a/pkgs/test/build-environment-info/default.nix
+++ b/pkgs/test/build-environment-info/default.nix
@@ -1,11 +1,39 @@
-{ runCommand }:
+{
+  lib,
+  stdenv,
+  runCommand,
+  getent,
+  xcbuild,
+}:
 
 # Prints information about the state of the build environment for
 # assistance debugging Hydra. Feel free to add anything you would find
 # useful to this.
-runCommand "build-environment-info" { } ''
-  ulimit -a
+runCommand "build-environment-info"
+  {
+    nativeBuildInputs = [ getent ] ++ lib.optionals stdenv.buildPlatform.isDarwin [ xcbuild ];
+  }
+  ''
+    # It’s useful to get more info even if a command fails.
+    set +e
 
-  # Always fail so that this job can easily be restarted.
-  exit 1
-''
+    run() {
+      echoCmd : "$@"
+      "$@"
+    }
+
+    run uname -a
+
+    ${lib.optionalString stdenv.buildPlatform.isDarwin ''
+      run env SYSTEM_VERSION_COMPAT=0 plutil -p /System/Library/CoreServices/SystemVersion.plist
+    ''}
+
+    run id
+
+    run getent passwd "$(id -un)"
+
+    run ulimit -a
+
+    # Always fail so that this job can easily be restarted.
+    run exit 1
+  ''
diff --git a/pkgs/test/nixos-functions/default.nix b/pkgs/test/nixos-functions/default.nix
index bdd5e3c6d8b4..fc9a726570ff 100644
--- a/pkgs/test/nixos-functions/default.nix
+++ b/pkgs/test/nixos-functions/default.nix
@@ -17,15 +17,13 @@ let
     versionSuffix = "test";
     label = "test";
   };
-in lib.optionalAttrs stdenv.hostPlatform.isLinux (
-  pkgs.recurseIntoAttrs {
+in pkgs.recurseIntoAttrs {
 
-    nixos-test = (pkgs.nixos {
-      system.nixos = dummyVersioning;
-      boot.loader.grub.enable = false;
-      fileSystems."/".device = "/dev/null";
-      system.stateVersion = lib.trivial.release;
-    }).toplevel;
+  nixos-test = (pkgs.nixos {
+    system.nixos = dummyVersioning;
+    boot.loader.grub.enable = false;
+    fileSystems."/".device = "/dev/null";
+    system.stateVersion = lib.trivial.release;
+  }).toplevel;
 
-  }
-)
+}
diff --git a/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix b/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix
index 1356fc325047..ac4375c1960d 100644
--- a/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix
+++ b/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix
@@ -66,6 +66,11 @@ let
     '';
     # discourage nix-env from matching this package
     priority = 10;
+    platforms = lib.platforms.all;
+    # These create a large number of jobs, which puts load on Hydra
+    # without any appreciable benefit (as the combined packages already
+    # cause them all to be built and cached anyway).
+    hydraPlatforms = [ ];
   } // lib.optionalAttrs (args ? shortdesc) {
     description = args.shortdesc;
   };
diff --git a/pkgs/top-level/php-packages.nix b/pkgs/top-level/php-packages.nix
index 7665c2ff4b58..0d864e837ff2 100644
--- a/pkgs/top-level/php-packages.nix
+++ b/pkgs/top-level/php-packages.nix
@@ -181,8 +181,8 @@ in {
 
       meta = {
         description = "PHP upstream extension: ${name}";
-        inherit (php.meta) maintainers homepage license;
-      };
+        inherit (php.meta) maintainers homepage license platforms;
+      } // args.meta or { };
     }));
 
   php = phpPackage;
@@ -461,13 +461,6 @@ in {
           env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { NIX_LDFLAGS = "-liconv"; };
           doCheck = stdenv.hostPlatform.isLinux;
         }
-        {
-          name = "imap";
-          buildInputs = [ uwimap openssl pam pcre2 libkrb5 ];
-          configureFlags = [ "--with-imap=${uwimap}" "--with-imap-ssl" "--with-kerberos" ];
-          # Using version from PECL on new PHP versions.
-          enable = lib.versionOlder php.version "8.3";
-        }
         {
           name = "intl";
           buildInputs = [ icu73 ];
@@ -563,7 +556,7 @@ in {
           internalDeps = [ php.extensions.pdo ];
           configureFlags = [ "--with-pdo-dblib=${freetds}" ];
           # Doesn't seem to work on darwin.
-          enable = (!stdenv.hostPlatform.isDarwin);
+          meta.broken = (!stdenv.hostPlatform.isDarwin);
           doCheck = false;
         }
         {
@@ -658,7 +651,7 @@ in {
           buildInputs = [ net-snmp openssl ];
           configureFlags = [ "--with-snmp" ];
           # net-snmp doesn't build on darwin.
-          enable = (!stdenv.hostPlatform.isDarwin);
+          meta.broken = (!stdenv.hostPlatform.isDarwin);
           doCheck = false;
         }
         {
@@ -813,6 +806,13 @@ in {
             "--with-zlib"
           ];
         }
+      ] ++ lib.optionals (lib.versionOlder php.version "8.3") [
+        # Using version from PECL on new PHP versions.
+        {
+          name = "imap";
+          buildInputs = [ uwimap openssl pam pcre2 libkrb5 ];
+          configureFlags = [ "--with-imap=${uwimap}" "--with-imap-ssl" "--with-kerberos" ];
+        }
       ];
 
       # Convert the list of attrs:
@@ -821,14 +821,12 @@ in {
       # [ { name = <name>; value = <extension drv>; } ... ]
       #
       # which we later use listToAttrs to make all attrs available by name.
-      #
-      # Also filter out extensions based on the enable property.
       namedExtensions = builtins.map
         (drv: {
           name = drv.name;
-          value = mkExtension (builtins.removeAttrs drv [ "enable" ]);
+          value = mkExtension drv;
         })
-        (builtins.filter (i: i.enable or true) extensionData);
+        extensionData;
 
       # Produce the final attribute set of all extensions defined.
     in
diff --git a/pkgs/top-level/release-lib.nix b/pkgs/top-level/release-lib.nix
index e27b65dbd49a..41221f8b89f3 100644
--- a/pkgs/top-level/release-lib.nix
+++ b/pkgs/top-level/release-lib.nix
@@ -169,7 +169,7 @@ let
       if isDerivation value then
         value.meta.hydraPlatforms
           or (subtractLists (value.meta.badPlatforms or [])
-               (value.meta.platforms or [ "x86_64-linux" ]))
+               (value.meta.platforms or supportedSystems))
       else if value.recurseForDerivations or false || value.recurseForRelease or false then
         packagePlatforms value
       else