diff --git a/pkgs/by-name/li/librum/package.nix b/pkgs/by-name/li/librum/package.nix
index 81cd81d68019..928bc7e0439c 100644
--- a/pkgs/by-name/li/librum/package.nix
+++ b/pkgs/by-name/li/librum/package.nix
@@ -13,14 +13,14 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "librum";
-  version = "0.12.1";
+  version = "0.12.2";
 
   src = fetchFromGitHub {
     owner = "Librum-Reader";
     repo = "Librum";
     rev = "v.${version}";
     fetchSubmodules = true;
-    hash = "sha256-/QxTWlTMoXykPe3z+mmn6eaGRJDu2IX8BJPcXi1gUqQ=";
+    hash = "sha256-Iwcbcz8LrznFP8rfW6mg9p7klAtTx4daFxylTeFKrH0=";
   };
 
   patches = [
diff --git a/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch b/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch
index 0458279b7d68..6133623b9e38 100644
--- a/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch
+++ b/pkgs/by-name/li/librum/use_mupdf_in_nixpkgs.patch
@@ -1,21 +1,20 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 191ff732..de46f35b 100644
+index 191ff732..4a50f7de 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -71,7 +71,7 @@ endif()
+@@ -71,6 +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
+index 0a41c5fd..f8714715 100644
 --- a/src/application/CMakeLists.txt
 +++ b/src/application/CMakeLists.txt
-@@ -102,10 +102,9 @@ if(ANDROID)
+@@ -107,7 +107,7 @@ if(ANDROID)
  endif()
  
  if(UNIX)
@@ -23,48 +22,38 @@ index bf122a66..64415be3 100644
 +    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)
+     set(MUPDF_BUILD_COMMAND ./scripts/mupdfwrap.py ${VENV_OPTION} -d build/$<IF:$<CONFIG:Debug>,shared-debug,shared-release> -b --m-target 'libs tools' ${EXTRA_MAKE_AGRS} -j 0 m01)
+@@ -145,21 +145,6 @@ else()
+     set(EXECUTABLE_EXTENSION ".exe")
  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
+-   # Build mupdf
 -   COMMAND ${CMAKE_COMMAND} -E env
 -        ${ANDROID_COMPILERS}
 -        "USE_SYSTEM_LIBJPEG=${USE_SYSTEM_LIBJPEG_VALUE}"
 -        "USE_SONAME=no"
 -        ${MUPDF_BUILD_COMMAND}
+-   # Copy mutool to the build directory
+-   COMMAND ${CMAKE_COMMAND} -E copy
+-        "${MUPDF_OUTPUT_DIR}/mutool${EXECUTABLE_EXTENSION}"
+-        "${PROJECT_BINARY_DIR}/mutool${EXECUTABLE_EXTENSION}"
 -   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
+@@ -182,7 +167,6 @@ add_library(application
+                     ${application_SRC}
  )
  
 -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
+@@ -202,11 +186,6 @@ target_include_directories(application
                      ${CMAKE_CURRENT_SOURCE_DIR}/core/utils
  )
  
@@ -73,18 +62,17 @@ index bf122a66..64415be3 100644
 -                    ${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
+@@ -251,29 +230,10 @@ if(LINUX)
              DESTINATION lib
              )
--    
+     
 -    # Install mupdf's shared libraries
 -    install(FILES ${MUPDF_OUTPUT_DIR}/libmupdfcpp.so
 -                  ${MUPDF_OUTPUT_DIR}/libmupdf.so
+-                  ${MUPDF_OUTPUT_DIR}/mutool${EXECUTABLE_EXTENSION}
 -            DESTINATION lib)
 -
 -    # Install links with correct permissions