diff --git a/pkgs/development/tools/osslsigncode/darwin-cmake.patch b/pkgs/development/tools/osslsigncode/darwin-cmake.patch
deleted file mode 100644
index 477a81c9c399..000000000000
--- a/pkgs/development/tools/osslsigncode/darwin-cmake.patch
+++ /dev/null
@@ -1,20 +0,0 @@
-diff --git a/cmake/SetCompilerFlags.cmake b/cmake/SetCompilerFlags.cmake
-index 8e83390..bd734f0 100644
---- a/cmake/SetCompilerFlags.cmake
-+++ b/cmake/SetCompilerFlags.cmake
-@@ -98,13 +98,13 @@ function(add_compile_flags target)
-       endif()
-     endif()
-     # Support address space layout randomization (ASLR)
--    if(NOT (MINGW OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang"))
-+    if(NOT (MINGW OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang" OR ((CMAKE_SYSTEM_NAME MATCHES Darwin) AND (CMAKE_C_COMPILER_ID MATCHES Clang))))
-       target_compile_options(${target} PRIVATE -fPIE)
-       target_link_options(${target} PRIVATE -fPIE -pie)
-       target_link_options(${target} PRIVATE -Wl,-z,relro)
-       target_link_options(${target} PRIVATE -Wl,-z,now)
-       target_link_options(${target} PRIVATE -Wl,-z,noexecstack)
--    endif(NOT (MINGW OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang"))
-+    endif(NOT (MINGW OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang" OR ((CMAKE_SYSTEM_NAME MATCHES Darwin) AND (CMAKE_C_COMPILER_ID MATCHES Clang))))
-     target_link_options(${target} PRIVATE -fstack-check)
-     add_compile_flag_to_targets(${target})
-   endif(MSVC)
diff --git a/pkgs/development/tools/osslsigncode/default.nix b/pkgs/development/tools/osslsigncode/default.nix
index b0407c96eec1..4738ccd74a9c 100644
--- a/pkgs/development/tools/osslsigncode/default.nix
+++ b/pkgs/development/tools/osslsigncode/default.nix
@@ -2,6 +2,7 @@
 , stdenv
 , fetchFromGitHub
 , cmake
+, fetchpatch
 , pkg-config
 , curl
 , openssl
@@ -18,7 +19,18 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-33uT9PFD1YEIMzifZkpbl2EAoC98IsM72K4rRjDfh8g=";
   };
 
-  patches = [ ./darwin-cmake.patch ];
+  patches = [
+    # Cygwin patch is prereq for Darwin fix applying -- committed to master after 2.5 release
+    (fetchpatch {
+      url = "https://github.com/mtrojnar/osslsigncode/commit/1c678bf926b78c947b14c46c3ce88e06268c738e.patch";
+      sha256 = "sha256-vOBMGIJ3PHJTvmsXRRfAUJRi7P929PcfmrUiRuM0pf4=";
+    })
+    # Fix build on Darwin when clang not identified as Apple (https://github.com/mtrojnar/osslsigncode/pull/247)
+    (fetchpatch {
+      url = "https://github.com/charles-dyfis-net/osslsigncode/commit/b2ed89b35c8a26faa7eb6515fecaff3c4c5f7fed.patch";
+      sha256 = "sha256-FGKZK/IzHbbkTzSoAtpC75z79d5+qQvvJrjEDY31WJ0=";
+    })
+  ];
 
   nativeBuildInputs = [ cmake pkg-config ];