diff --git a/pkgs/development/libraries/libunwind/default.nix b/pkgs/development/libraries/libunwind/default.nix
index 474b91751507..8565bc75ff9f 100644
--- a/pkgs/development/libraries/libunwind/default.nix
+++ b/pkgs/development/libraries/libunwind/default.nix
@@ -9,6 +9,10 @@ stdenv.mkDerivation rec {
     sha256 = "1jsslwkilwrsj959dc8b479qildawz67r8m4lzxm7glcwa8cngiz";
   };
 
+  patches = [
+    ./version-1.2.1.patch
+  ];
+
   nativeBuildInputs = [ autoreconfHook ];
 
   outputs = [ "out" "dev" ];
diff --git a/pkgs/development/libraries/libunwind/version-1.2.1.patch b/pkgs/development/libraries/libunwind/version-1.2.1.patch
new file mode 100644
index 000000000000..63202937084c
--- /dev/null
+++ b/pkgs/development/libraries/libunwind/version-1.2.1.patch
@@ -0,0 +1,13 @@
+diff --git a/configure.ac b/configure.ac
+index a254bbe..fe0247b 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1,6 +1,6 @@
+ define(pkg_major, 1)
+-define(pkg_minor, 2.1)
+-define(pkg_extra, )
++define(pkg_minor, 2)
++define(pkg_extra, 1)
+ define(pkg_maintainer, libunwind-devel@nongnu.org)
+ define(mkvers, $1.$2$3)
+ dnl Process this file with autoconf to produce a configure script.