diff --git a/packages/default.nix b/packages/default.nix
index 27e25b65..dedc75fb 100644
--- a/packages/default.nix
+++ b/packages/default.nix
@@ -103,7 +103,7 @@ inputs: rec
   py4vasp = inputs.pkgs.callPackage ./py4vasp.nix { src = inputs.topInputs.py4vasp; };
   pocketfft = inputs.pkgs.callPackage ./pocketfft.nix { src = inputs.topInputs.pocketfft; };
   spectroscopy = inputs.pkgs.callPackage ./spectroscopy.nix { src = inputs.topInputs.spectroscopy; };
-  mirism = inputs.pkgs.callPackage ./mirism.nix { inherit biu; stdenv = inputs.pkgs.clang18Stdenv; };
+  mirism = inputs.pkgs.callPackage ./mirism { inherit biu; stdenv = inputs.pkgs.clang18Stdenv; };
 
   fromYaml = content: builtins.fromJSON (builtins.readFile
     (inputs.pkgs.runCommand "toJSON" {}
diff --git a/packages/mirism/CMakeLists.txt b/packages/mirism/CMakeLists.txt
index b2c83d2e..764a87ef 100644
--- a/packages/mirism/CMakeLists.txt
+++ b/packages/mirism/CMakeLists.txt
@@ -10,10 +10,11 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 endif()
 
 find_package(biu REQUIRED)
+find_package(httplib REQUIRED)
 
 add_executable(mirism src/main.cpp)
 target_compile_features(mirism PUBLIC cxx_std_23)
-target_link_libraries(mirism PRIVATE biu::biu)
+target_link_libraries(mirism PRIVATE biu::biu httplib::httplib)
 
 install(TARGETS mirism RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 
diff --git a/packages/mirism/default.nix b/packages/mirism/default.nix
index 62d7605e..92301284 100644
--- a/packages/mirism/default.nix
+++ b/packages/mirism/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, cmake, pkg-config, biu }: stdenv.mkDerivation
+{ stdenv, cmake, pkg-config, biu, httplib }: stdenv.mkDerivation
 {
   name = "mirism";
   src = ./.;
-  buildInputs = [ biu ];
+  buildInputs = [ biu httplib ];
   nativeBuildInputs = [ cmake pkg-config ];
 }
diff --git a/packages/mirism/src/main.cpp b/packages/mirism/src/main.cpp
new file mode 100644
index 00000000..5a71c546
--- /dev/null
+++ b/packages/mirism/src/main.cpp
@@ -0,0 +1,21 @@
+# include <biu.hpp>
+# include <httplib.h>
+
+int main()
+{
+  using namespace biu::literals;
+
+  httplib::SSLServer srv("/var/lib/acme/debug.mirism.one/fullchain.pem",
+    "/var/lib/acme/debug.mirism.one/key.pem");
+  srv.Get("/", [](const httplib::Request& req, httplib::Response& res) {
+    std::cout << "{}"_f(req.headers) << std::endl;
+    httplib::Client cli("https://github.com");
+    auto upstream_res = cli.Get("/");
+    res.headers = upstream_res->headers;
+    res.body = upstream_res->body;
+    res.status = upstream_res->status;
+    std::cout << "{}"_f(upstream_res->headers) << std::endl;
+    std::cout << "{}"_f(upstream_res->body) << std::endl;
+  });
+  srv.listen("127.0.0.1", 15641);
+}