diff --git a/pkgs/by-name/li/librum/package.nix b/pkgs/by-name/li/librum/package.nix
new file mode 100644
index 000000000000..81cd81d68019
--- /dev/null
+++ b/pkgs/by-name/li/librum/package.nix
@@ -0,0 +1,68 @@
+{ lib
+, mupdf
+, stdenv
+, fetchFromGitHub
+, substituteAll
+, cmake
+, qt6
+, desktopToDarwinBundle
+}:
+
+let
+  mupdf-cxx = mupdf.override { enableCxx = true; };
+in
+stdenv.mkDerivation rec {
+  pname = "librum";
+  version = "0.12.1";
+
+  src = fetchFromGitHub {
+    owner = "Librum-Reader";
+    repo = "Librum";
+    rev = "v.${version}";
+    fetchSubmodules = true;
+    hash = "sha256-/QxTWlTMoXykPe3z+mmn6eaGRJDu2IX8BJPcXi1gUqQ=";
+  };
+
+  patches = [
+    (substituteAll {
+      src = ./use_mupdf_in_nixpkgs.patch;
+      nixMupdfLibPath = "${mupdf-cxx.out}/lib";
+      nixMupdfIncludePath = "${mupdf-cxx.dev}/include";
+    })
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    qt6.qttools
+    qt6.wrapQtAppsHook
+  ] ++ lib.optionals stdenv.isDarwin [
+    desktopToDarwinBundle
+  ];
+
+  buildInputs = [
+    qt6.qtbase
+    qt6.qtsvg
+  ] ++ lib.optionals stdenv.isLinux [
+    qt6.qtwayland
+  ];
+
+  meta = with lib; {
+    description = "An application designed to make reading enjoyable and straightforward";
+    longDescription = ''
+      Librum is an application designed to make reading enjoyable
+      and straightforward for everyone. It's not just an e-book
+      reader. With Librum, you can manage your own online library
+      and access it from any device anytime, anywhere. It has
+      features like note-taking, AI tooling, and highlighting,
+      while offering customization to make it as personal as you
+      want! Librum also provides free access to over 70,000 books
+      and personal reading statistics while being free and
+      completely open source.
+    '';
+    homepage = "https://librumreader.com";
+    license = licenses.gpl3Plus;
+    mainProgram = "librum";
+    maintainers = with maintainers; [ aleksana oluceps ];
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch b/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch
new file mode 100644
index 000000000000..0458279b7d68
--- /dev/null
+++ b/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch
@@ -0,0 +1,109 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 191ff732..de46f35b 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -71,7 +71,7 @@ endif()
+ 
+ # Dependencies
+ add_subdirectory(libs/rapidfuzz-cpp)
+-
++include_directories(@nixMupdfIncludePath@)
+ 
+ # Build
+ add_subdirectory(src/)
+diff --git a/src/application/CMakeLists.txt b/src/application/CMakeLists.txt
+index bf122a66..64415be3 100644
+--- a/src/application/CMakeLists.txt
++++ b/src/application/CMakeLists.txt
+@@ -102,10 +102,9 @@ if(ANDROID)
+ endif()
+ 
+ if(UNIX)
+-    set(MUPDF_OUTPUT_DIR "${PROJECT_SOURCE_DIR}/libs/mupdf/build/$<IF:$<CONFIG:Debug>,shared-debug,shared-release>")
++    set(MUPDF_OUTPUT_DIR "@nixMupdfLibPath@")
+     set(MUPDF_OUTPUT "${MUPDF_OUTPUT_DIR}/libmupdfcpp.so")
+     set(MUPDF_OUTPUT "${MUPDF_OUTPUT_DIR}/libmupdfcpp.so" PARENT_SCOPE)
+-    set(MUPDF_BUILD_COMMAND ./scripts/mupdfwrap.py ${VENV_OPTION} -d build/$<IF:$<CONFIG:Debug>,shared-debug,shared-release> -b --m-target libs ${EXTRA_MAKE_AGRS} -j 0 m01)
+ elseif(WIN32)
+     set(MUPDF_OUTPUT_DIR "${PROJECT_SOURCE_DIR}/libs/mupdf/platform/win32/x64/$<IF:$<CONFIG:Debug>,Debug,Release>")
+     set(MUPDF_OUTPUT "${MUPDF_OUTPUT_DIR}/mupdfcpp64.lib" PARENT_SCOPE)
+@@ -113,8 +112,6 @@ elseif(WIN32)
+     set(MUPDF_BUILD_COMMAND python scripts/mupdfwrap.py ${VENV_OPTION} -d build/$<IF:$<CONFIG:Debug>,shared-debug,shared-release> -b -j 0 m01)
+ endif()
+ 
+-message("MuPdf build command: " ${MUPDF_BUILD_COMMAND})
+-
+ 
+ set(CC_COMMAND "${CMAKE_C_COMPILER}")
+ set(CXX_COMMAND "${CMAKE_CXX_COMPILER}")
+@@ -135,18 +132,6 @@ else()
+ endif()
+ 
+ 
+-add_custom_target(mupdf
+-   COMMAND ${CMAKE_COMMAND} -E env
+-        ${ANDROID_COMPILERS}
+-        "USE_SYSTEM_LIBJPEG=${USE_SYSTEM_LIBJPEG_VALUE}"
+-        "USE_SONAME=no"
+-        ${MUPDF_BUILD_COMMAND}
+-   BYPRODUCTS ${MUPDF_OUTPUT}
+-   WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/libs/mupdf
+-   COMMENT "Building mupdf (This takes a while) ..."
+-)
+-
+-
+ #Copy the mupdf dlls to the build directory for windows
+ if(WIN32)
+     add_custom_command(
+@@ -168,8 +153,6 @@ add_library(application
+                     interfaces/utility/i_book_getter.hpp
+ )
+ 
+-add_dependencies(application mupdf) # Ensure the mupdf target is built before the application target
+-
+ target_compile_definitions(application PRIVATE APPLICATION_LIBRARY)
+ 
+ target_include_directories(application
+@@ -188,12 +171,6 @@ target_include_directories(application
+                     ${CMAKE_CURRENT_SOURCE_DIR}/core/utils
+ )
+ 
+-# Make sure to ignore warnings from mupdf by adding it as a system include directory
+-target_include_directories(application SYSTEM PUBLIC
+-                    ${PROJECT_SOURCE_DIR}/libs/mupdf/platform/c++/include
+-                    ${PROJECT_SOURCE_DIR}/libs/mupdf/include
+-)
+-
+ target_compile_definitions(application
+                 PRIVATE
+                     $<$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>:QT_QML_DEBUG>
+@@ -236,29 +213,10 @@ if(LINUX)
+     install(TARGETS application
+             DESTINATION lib
+             )
+-    
+-    # Install mupdf's shared libraries
+-    install(FILES ${MUPDF_OUTPUT_DIR}/libmupdfcpp.so
+-                  ${MUPDF_OUTPUT_DIR}/libmupdf.so
+-            DESTINATION lib)
+-
+-    # Install links with correct permissions
+-    if(EXISTS "${MUPDF_OUTPUT_DIR}/libmupdfcpp.so.24.0")
+-        install(FILES ${MUPDF_OUTPUT_DIR}/libmupdfcpp.so.24.0
+-                      ${MUPDF_OUTPUT_DIR}/libmupdf.so.24.0
+-                PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
+-                            GROUP_READ GROUP_EXECUTE
+-                            WORLD_READ WORLD_EXECUTE
+-                DESTINATION lib)
+-    endif()
+ 
+ elseif(APPLE)
+     install(TARGETS application
+             DESTINATION lib
+             )
+     
+-    # Install mupdf's shared libraries
+-    install(FILES ${MUPDF_OUTPUT_DIR}/libmupdfcpp.so
+-                  ${MUPDF_OUTPUT_DIR}/libmupdf.dylib
+-            DESTINATION lib)
+ endif()