dftd4: fix installation path of Fortran headers

    hash = "sha256-VIV9953hx0MZupOARdH+P1h7JtZeJmTlqtO8si+lwdU=";

  };

  patches = [

    # Make sure fortran headers are installed directly in /include

    ./fortran-module-dir.patch

  ];

  nativeBuildInputs = [ gfortran meson ninja pkg-config python3 ];

  buildInputs = [ blas lapack mctc-lib mstore multicharge ];

diff --git a/CMakeLists.txt b/CMakeLists.txt

index f222aab..262b505 100644

--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -89,7 +89,6 @@ target_include_directories(

   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>

   $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>

   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>

-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${module-dir}>

 )

 target_include_directories(

   "${PROJECT_NAME}-lib"

@@ -132,7 +131,7 @@ install(

 install(

   DIRECTORY

   "${CMAKE_CURRENT_BINARY_DIR}/include/"

-  DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${module-dir}"

+  DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/"

 )

 if(WITH_API)

   enable_language("C")

diff --git a/config/template.cmake b/config/template.cmake

index 8b5141d..8f94d66 100644

--- a/config/template.cmake

+++ b/config/template.cmake

@@ -6,7 +6,6 @@ set("@PROJECT_NAME@_WITH_OpenMP" @WITH_OpenMP@)

 set(

   "@PROJECT_NAME@_INCLUDE_DIRS"

   "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@"

-  "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@/@module-dir@"

 )

 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")

diff --git a/config/template.pc b/config/template.pc

index 3d6efbb..fea69e4 100644

--- a/config/template.pc

+++ b/config/template.pc

@@ -6,4 +6,4 @@ Name: @PROJECT_NAME@

 Description: @PROJECT_DESCRIPTION@

 Version: @PROJECT_VERSION@

 Libs: -L${libdir} -l@PROJECT_NAME@

-Cflags: -I${includedir} -I${includedir}/@module-dir@

+Cflags: -I${includedir} -I${includedir}/

diff --git a/meson.build b/meson.build

index c9e9c58..ac8f0bd 100644

--- a/meson.build

+++ b/meson.build

@@ -83,7 +83,7 @@ if install

     )

   endif

-  module_id = meson.project_name() / fc_id + '-' + fc.version()

+  module_id = meson.project_name()

   meson.add_install_script(

     find_program(files('config'/'install-mod.py')),

     get_option('includedir') / module_id,