diff --git a/pkgs/by-name/de/dedup-darwin/build-date-fix.patch b/pkgs/by-name/de/dedup-darwin/build-date-fix.patch
new file mode 100644
index 000000000000..0e70af1976bb
--- /dev/null
+++ b/pkgs/by-name/de/dedup-darwin/build-date-fix.patch
@@ -0,0 +1,13 @@
+diff --git a/Makefile b/Makefile
+index c9c56ec..75654f7 100644
+--- a/Makefile
++++ b/Makefile
+@@ -29,7 +29,7 @@ CFLAGS += \
+     -mtune=generic \
+     -O \
+     '-DVERSION="$(VERSION)"' \
+-    '-DBUILD_DATE="$(shell date '+%Y%m%d')"'
++    '-DBUILD_DATE="19700101"'
+ 
+ ENTITLEMENT_FLAGS =
+ 
diff --git a/pkgs/by-name/de/dedup-darwin/no-codesign.patch b/pkgs/by-name/de/dedup-darwin/no-codesign.patch
new file mode 100644
index 000000000000..fd432bd33dbd
--- /dev/null
+++ b/pkgs/by-name/de/dedup-darwin/no-codesign.patch
@@ -0,0 +1,18 @@
+Entitlements & code signature are only needed 
+for ASAN and other debugging tools.
+See official README for more details.
+
+diff --git a/Makefile b/Makefile
+index c9c56ec..36b81e0 100644
+--- a/Makefile
++++ b/Makefile
+@@ -63,9 +63,6 @@ dedup.x86_64: CFLAGS += -target x86_64-apple-macos11
+ 
+ dedup dedup.arm dedup.x86_64: $(OBJECTS)
+ 	$(CC) $(CFLAGS) -o $@ $^
+-	mv $@ $@.unsigned
+-	codesign -s - -v -f $(ENTITLEMENT_FLAGS) $@.unsigned
+-	mv $@.unsigned $@
+ 
+ dedup.universal:
+ 	rm -f *.o
diff --git a/pkgs/by-name/de/dedup-darwin/package.nix b/pkgs/by-name/de/dedup-darwin/package.nix
new file mode 100644
index 000000000000..9f177323afb5
--- /dev/null
+++ b/pkgs/by-name/de/dedup-darwin/package.nix
@@ -0,0 +1,42 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "dedup-darwin";
+  version = "0.0.6";
+
+  src = fetchFromGitHub {
+    owner = "ttkb-oss";
+    repo = "dedup";
+    tag = "release-${finalAttrs.version}";
+    hash = "sha256-/qVrZVSVJPANMuKphbekB4p4ehjrOg6097yvjdIdl7I=";
+  };
+
+  patches = [
+    ./build-date-fix.patch
+    ./no-codesign.patch
+  ];
+
+  postPatch = ''
+    # Fix the prefix
+    substituteInPlace Makefile --replace-fail \
+      "PREFIX ?= /usr/local" "PREFIX ?= ${placeholder "out"}"
+  '';
+
+  preInstall = ''
+    # Install complains of missing directories, hence this fix.
+    mkdir -p $out/{bin,share/man/man1}
+  '';
+
+  meta = {
+    description = "Darwin utility to replace duplicate file data with a copy-on-write clone";
+    homepage = "https://github.com/ttkb-oss/dedup";
+    license = lib.licenses.bsd2;
+    maintainers = [ lib.maintainers.matteopacini ];
+    platforms = lib.platforms.darwin;
+    mainProgram = "dedup";
+  };
+})