diff --git a/pkgs/by-name/in/inmarsatc/package.nix b/pkgs/by-name/in/inmarsatc/package.nix
new file mode 100644
index 000000000000..c1ff54c4e6b3
--- /dev/null
+++ b/pkgs/by-name/in/inmarsatc/package.nix
@@ -0,0 +1,35 @@
+{
+  lib,
+  stdenv,
+  cmake,
+  fetchFromGitHub,
+  nix-update-script,
+}:
+stdenv.mkDerivation {
+  pname = "inmarsatc";
+  version = "0-unstable-2023-07-10";
+
+  src = fetchFromGitHub {
+    owner = "cropinghigh";
+    repo = "inmarsatc";
+    rev = "cda1242e79981d71cd8608e971c8dbc691942b10";
+    hash = "sha256-UCmdHR9bSr1x4G0OP7n+o6pdS1thTl9hzH7YMykSiGw=";
+  };
+
+  __structuredAttrs = true;
+  strictDeps = true;
+
+  nativeBuildInputs = [ cmake ];
+
+  passthru.updateScript = nix-update-script {
+    extraArgs = [ "--version=branch" ];
+  };
+
+  meta = {
+    description = "C++ library with functions to receive Inmarsat-C signals";
+    homepage = "https://github.com/cropinghigh/inmarsatc";
+    license = lib.licenses.gpl3Only;
+    maintainers = [ lib.maintainers.nekowinston ];
+    platforms = lib.platforms.linux;
+  };
+}