diff --git a/pkgs/development/libraries/tclap/default.nix b/pkgs/development/libraries/tclap/1.2.nix
similarity index 100%
rename from pkgs/development/libraries/tclap/default.nix
rename to pkgs/development/libraries/tclap/1.2.nix
diff --git a/pkgs/development/libraries/tclap/1.4.nix b/pkgs/development/libraries/tclap/1.4.nix
new file mode 100644
index 00000000000..7a0b5765963
--- /dev/null
+++ b/pkgs/development/libraries/tclap/1.4.nix
@@ -0,0 +1,48 @@
+{ lib
+, stdenv
+, fetchgit
+, cmake
+, doxygen
+, python3
+}:
+stdenv.mkDerivation {
+  pname = "tclap";
+
+  # This version is slightly newer than 1.4.0-rc1:
+  # See https://github.com/mirror/tclap/compare/1.4.0-rc1..3feeb7b2499b37d9cb80890cadaf7c905a9a50c6
+  version = "1.4-3feeb7b";
+
+  src = fetchgit {
+    url = "git://git.code.sf.net/p/tclap/code";
+    rev = "3feeb7b2499b37d9cb80890cadaf7c905a9a50c6"; # 1.4 branch
+    hash = "sha256-byLianB6Vf+I9ABMmsmuoGU2o5RO9c5sMckWW0F+GDM=";
+  };
+
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace '$'{CMAKE_INSTALL_LIBDIR_ARCHIND} '$'{CMAKE_INSTALL_LIBDIR}
+    substituteInPlace packaging/pkgconfig.pc.in \
+      --replace '$'{prefix}/@CMAKE_INSTALL_INCLUDEDIR@ @CMAKE_INSTALL_FULL_INCLUDEDIR@
+  '';
+
+  nativeBuildInputs = [
+    cmake
+    doxygen
+    python3
+  ];
+
+  # Installing docs is broken in this package+version so we stub out some files
+  preInstall = ''
+    touch docs/manual.html
+  '';
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Templatized C++ Command Line Parser Library (v1.4)";
+    homepage = "https://tclap.sourceforge.net/";
+    license = licenses.mit;
+    maintainers = teams.deshaw.members;
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 523be31c5a0..38c00cfc82b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -24858,7 +24858,11 @@ with pkgs;
 
   taskflow = callPackage ../development/libraries/taskflow { };
 
-  tclap = callPackage ../development/libraries/tclap { };
+  tclap = tclap_1_2;
+
+  tclap_1_2 = callPackage ../development/libraries/tclap/1.2.nix { };
+
+  tclap_1_4 = callPackage ../development/libraries/tclap/1.4.nix { };
 
   tcllib = callPackage ../development/libraries/tcllib { };