diff --git a/pkgs/by-name/op/opencbm/fix-dfu_bool.patch b/pkgs/by-name/op/opencbm/fix-dfu_bool.patch
new file mode 100644
index 000000000000..a69f8c77c1b3
--- /dev/null
+++ b/pkgs/by-name/op/opencbm/fix-dfu_bool.patch
@@ -0,0 +1,16 @@
+diff --git a/xum1541cfg/dfu-programmer-0.5.4/src/dfu-bool.h b/xum1541cfg/dfu-programmer-0.5.4/src/dfu-bool.h
+index 3dbe5a53..c77bc686 100644
+--- a/xum1541cfg/dfu-programmer-0.5.4/src/dfu-bool.h
++++ b/xum1541cfg/dfu-programmer-0.5.4/src/dfu-bool.h
+@@ -1,9 +1,6 @@
+ #ifndef __DFU_BOOL_H__
+ #define __DFU_BOOL_H__
+ 
+-typedef enum {
+-    false = 0,
+-    true  = 1
+-} dfu_bool;
+-
++#include <stdbool.h>
++#define dfu_bool bool
+ #endif
diff --git a/pkgs/by-name/op/opencbm/package.nix b/pkgs/by-name/op/opencbm/package.nix
index c7e8c45ba390..2631a75e42be 100644
--- a/pkgs/by-name/op/opencbm/package.nix
+++ b/pkgs/by-name/op/opencbm/package.nix
@@ -15,10 +15,14 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "OpenCBM";
     repo = "OpenCBM";
-    rev = "v${finalAttrs.version}";
-    sha256 = "sha256-5lj5F79Gbhrvi9dxKGobdyDyBLGcptAtxx9SANhLrKw=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-5lj5F79Gbhrvi9dxKGobdyDyBLGcptAtxx9SANhLrKw=";
   };
 
+  patches = [
+    ./fix-dfu_bool.patch
+  ];
+
   makefile = "LINUX/Makefile";
   makeFlags = [
     "PREFIX=${placeholder "out"}"