diff --git a/pkgs/development/libraries/fmt/default.nix b/pkgs/development/libraries/fmt/default.nix
index a52211682ba1..6cb3ec5a2b30 100644
--- a/pkgs/development/libraries/fmt/default.nix
+++ b/pkgs/development/libraries/fmt/default.nix
@@ -1,37 +1,76 @@
 { stdenv, fetchFromGitHub, fetchpatch, cmake, enableShared ? true }:
 
-stdenv.mkDerivation rec {
-  pname = "fmt";
-  version = "7.0.3";
+let
+  generic = { version, sha256, patches ? [ ] }:
+    stdenv.mkDerivation {
+      pname = "fmt";
+      inherit version;
 
-  outputs = [ "out" "dev" ];
+      outputs = [ "out" "dev" ];
 
-  src = fetchFromGitHub {
-    owner = "fmtlib";
-    repo = "fmt";
-    rev = version;
+      src = fetchFromGitHub {
+        owner = "fmtlib";
+        repo = "fmt";
+        rev = version;
+        inherit sha256;
+      };
+
+      inherit patches;
+
+      nativeBuildInputs = [ cmake ];
+
+      cmakeFlags = [
+        "-DBUILD_SHARED_LIBS=${if enableShared then "ON" else "OFF"}"
+        "-DCMAKE_SKIP_BUILD_RPATH=OFF" # for tests
+      ];
+
+      doCheck = true;
+
+      meta = with stdenv.lib; {
+        description = "Small, safe and fast formatting library";
+        longDescription = ''
+          fmt (formerly cppformat) is an open-source formatting library. It can be
+          used as a fast and safe alternative to printf and IOStreams.
+        '';
+        homepage = "http://fmtlib.net/";
+        downloadPage = "https://github.com/fmtlib/fmt/";
+        maintainers = [ maintainers.jdehaas ];
+        license = licenses.bsd2;
+        platforms = platforms.all;
+      };
+    };
+in
+{
+  fmt_6 = generic {
+    version = "6.2.1";
+    sha256 = "1i6nfxazq4d05r3sxyc3ziwkqq7s8rdbv9p16afv66aqmsbqqqic";
+
+    patches = [
+      # Fix BC break breaking Kodi
+      # https://github.com/xbmc/xbmc/issues/17629
+      # https://github.com/fmtlib/fmt/issues/1620
+      (fetchpatch {
+        url = "https://github.com/fmtlib/fmt/commit/7d01859ef16e6b65bc023ad8bebfedecb088bf81.patch";
+        sha256 = "0v8hm5958ih1bmnjr16fsbcmdnq4ykyf6b0hg6dxd5hxd126vnxx";
+      })
+
+      # Fix paths in pkg-config file
+      # https://github.com/fmtlib/fmt/pull/1657
+      (fetchpatch {
+        url = "https://github.com/fmtlib/fmt/commit/78f041ab5b40a1145ba686aeb8013e8788b08cd2.patch";
+        sha256 = "1hqp96zl9l3qyvsm7pxl6ah8c26z035q2mz2pqhqa0wvzd1klcc6";
+      })
+
+      # Fix cmake config paths.
+      (fetchpatch {
+        url = "https://github.com/fmtlib/fmt/pull/1702.patch";
+        sha256 = "18cadqi7nac37ymaz3ykxjqs46rvki396g6qkqwp4k00cmic23y3";
+      })
+    ];
+  };
+
+  fmt_7 = generic {
+    version = "7.0.3";
     sha256 = "17q2fdzakk5p0s3fx3724gs5k2b5ylp8f1d6j2m3wgvlfldx9k9a";
   };
-
-  nativeBuildInputs = [ cmake ];
-
-  cmakeFlags = [
-    "-DBUILD_SHARED_LIBS=${if enableShared then "ON" else "OFF"}"
-    "-DCMAKE_SKIP_BUILD_RPATH=OFF" # for tests
-  ];
-
-  doCheck = true;
-
-  meta = with stdenv.lib; {
-    description = "Small, safe and fast formatting library";
-    longDescription = ''
-      fmt (formerly cppformat) is an open-source formatting library. It can be
-      used as a fast and safe alternative to printf and IOStreams.
-    '';
-    homepage = "http://fmtlib.net/";
-    downloadPage = "https://github.com/fmtlib/fmt/";
-    maintainers = [ maintainers.jdehaas ];
-    license = licenses.bsd2;
-    platforms = platforms.all;
-  };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 56856208c5b3..6fa8a46d4fa5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12461,7 +12461,10 @@ in
 
   flyway = callPackage ../development/tools/flyway { };
 
-  fmt = callPackage ../development/libraries/fmt/default.nix { };
+  inherit (callPackages ../development/libraries/fmt { })
+    fmt_6 fmt_7;
+
+  fmt = fmt_7;
 
   fplll = callPackage ../development/libraries/fplll {};
   fplll_20160331 = callPackage ../development/libraries/fplll/20160331.nix {};