diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 58ec22733bd2..eae53216e6c1 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -3488,6 +3488,11 @@
     githubId = 30630233;
     name = "Timo Triebensky";
   };
+  BIOS9 = {
+    name = "NightFish";
+    github = "BIOS9";
+    githubId = 15035908;
+  };
   birdee = {
     name = "birdee";
     github = "BirdeeHub";
diff --git a/pkgs/by-name/sl/slinktool/package.nix b/pkgs/by-name/sl/slinktool/package.nix
new file mode 100644
index 000000000000..b48501bd6eb8
--- /dev/null
+++ b/pkgs/by-name/sl/slinktool/package.nix
@@ -0,0 +1,46 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  versionCheckHook,
+  nix-update-script,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "slinktool";
+  version = "4.5.0";
+
+  src = fetchFromGitHub {
+    owner = "EarthScope";
+    repo = "slinktool";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-4UUvjlSqtBTiO200pb4FEFXEvUAmA4OlegrgF4wZII4=";
+  };
+
+  # slinktool uses K&R-style function pointers in some places; fails with modern GCC
+  env.NIX_CFLAGS_COMPILE = "-std=gnu89";
+
+  installPhase = ''
+    runHook preInstall
+
+    install -D slinktool $out/bin/slinktool
+
+    runHook postInstall
+  '';
+
+  versionCheckProgramArg = "-V";
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  doInstallCheck = true;
+
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    description = "SeedLink client for data stream inspection, data collection and server testing";
+    homepage = "https://github.com/EarthScope/slinktool";
+    changelog = "https://github.com/EarthScope/slinktool/releases/tag/${finalAttrs.src.tag}";
+    license = lib.licenses.lgpl3Only;
+    maintainers = with lib.maintainers; [ BIOS9 ];
+    platforms = lib.platforms.all;
+    mainProgram = "slinktool";
+  };
+})