diff --git a/debian/patches/drop-gnumakefile.patch b/debian/patches/drop-gnumakefile.patch
new file mode 100644
index 0000000..674cee9
--- /dev/null
+++ b/debian/patches/drop-gnumakefile.patch
@@ -0,0 +1,48 @@
+Description: Drop GNUmakefile
+ it shadows CMake/ninja without offering the functioniality we need
+Author: IOhannes m zmölnig <umlaeute@debian.org>
+Origin: Debian
+Bug: https://github.com/dyne/frei0r/issues/270
+Last-Update: 2026-04-17
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- frei0r.orig/GNUmakefile
++++ /dev/null
+@@ -1,37 +0,0 @@
+-all: release-gcc-ninja
+-
+-debug: debug-gcc
+-
+-release-gcc:
+-	mkdir -p build
+-	cd build && cmake -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=Release ..
+-	cd build && make
+-
+-release-gcc-ninja:
+-	mkdir -p build
+-	cd build && cmake -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=Release -G 'Ninja' ..
+-	cd build && ninja
+-
+-release-clang:
+-	mkdir -p build
+-	cd build && cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Release ..
+-	cd build && make
+-
+-release-clang-ninja:
+-	mkdir -p build
+-	cd build && cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Release -G 'Ninja' ..
+-	cd build && ninja
+-
+-debug-gcc:
+-	mkdir -p build
+-	cd build && cmake -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS_DEBUG='-ggdb -fno-omit-frame-pointer -fsanitize=address' -DCMAKE_C_FLAGS_DEBUG='-ggdb -fno-omit-frame-pointer -fsanitize=address' ..
+-	cd build && make
+-
+-
+-debug-clang-ninja:
+-	mkdir -p build
+-	cd build && cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS_DEBUG='-ggdb -fno-omit-frame-pointer -fsanitize=address' -DCMAKE_C_FLAGS_DEBUG='-ggdb -fno-omit-frame-pointer -fsanitize=address' -G 'Ninja' ..
+-	cd build && ninja
+-
+-clean:
+-	rm -rf build
diff --git a/debian/patches/series b/debian/patches/series
index 0775498..8e21d5d 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1 +1,2 @@
+drop-gnumakefile.patch
 arch-indep-pkgconf.patch