diff --git a/flake/dev.nix b/flake/dev.nix
index 61d80898..e3eb5b4d 100644
--- a/flake/dev.nix
+++ b/flake/dev.nix
@@ -38,4 +38,10 @@
       packages = [ clang-tools_18 ];
       CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     };
+  mirism = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  {
+    inputsFrom = [ pkgs.localPackages.mirism ];
+    packages = [ pkgs.clang-tools_18 ];
+    CMAKE_EXPORT_COMPILE_COMMANDS = "1";
+  };
 }
diff --git a/packages/default.nix b/packages/default.nix
index a0fa0577..27e25b65 100644
--- a/packages/default.nix
+++ b/packages/default.nix
@@ -103,6 +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; };
 
   fromYaml = content: builtins.fromJSON (builtins.readFile
     (inputs.pkgs.runCommand "toJSON" {}
diff --git a/packages/mirism/.envrc b/packages/mirism/.envrc
new file mode 100644
index 00000000..e8c19da5
--- /dev/null
+++ b/packages/mirism/.envrc
@@ -0,0 +1 @@
+use flake .#mirism
diff --git a/packages/mirism/CMakeLists.txt b/packages/mirism/CMakeLists.txt
new file mode 100644
index 00000000..b2c83d2e
--- /dev/null
+++ b/packages/mirism/CMakeLists.txt
@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.14)
+project(mirism VERSION 0.0.0 LANGUAGES CXX)
+enable_testing()
+include(GNUInstallDirs)
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  message("Setting build type to 'Release' as none was specified.")
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
+
+find_package(biu REQUIRED)
+
+add_executable(mirism src/main.cpp)
+target_compile_features(mirism PUBLIC cxx_std_23)
+target_link_libraries(mirism PRIVATE biu::biu)
+
+install(TARGETS mirism RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
+get_property(ImportedTargets DIRECTORY "${CMAKE_SOURCE_DIR}" PROPERTY IMPORTED_TARGETS)
+message("Imported targets: ${ImportedTargets}")
+message("List of compile features: ${CMAKE_CXX_COMPILE_FEATURES}")
diff --git a/packages/mirism/default.nix b/packages/mirism/default.nix
new file mode 100644
index 00000000..62d7605e
--- /dev/null
+++ b/packages/mirism/default.nix
@@ -0,0 +1,7 @@
+{ stdenv, cmake, pkg-config, biu }: stdenv.mkDerivation
+{
+  name = "mirism";
+  src = ./.;
+  buildInputs = [ biu ];
+  nativeBuildInputs = [ cmake pkg-config ];
+}