diff --git a/pkgs/tools/text/icdiff/default.nix b/pkgs/tools/text/icdiff/default.nix
index 8469a151aa09..e2be6e9aca31 100644
--- a/pkgs/tools/text/icdiff/default.nix
+++ b/pkgs/tools/text/icdiff/default.nix
@@ -1,14 +1,14 @@
-{ stdenv, fetchFromGitHub, buildPythonApplication }:
+{ stdenv, fetchFromGitHub, pythonPackages }:
 
-buildPythonApplication rec {
+pythonPackages.buildPythonApplication rec {
   name = "icdiff-${version}";
-  version = "1.7.3";
+  version = "1.9.0";
 
   src = fetchFromGitHub {
     owner = "jeffkaufman";
     repo = "icdiff";
     rev = "release-${version}";
-    sha256 = "1k7dlf2i40flsrvkma1k1vii9hsjwdmwryx65q0n0yj4frv7ky6k";
+    sha256 = "03gcgj3xsqasvgkr8r0q1ljbw2kd2xmfb21qpxhk9lqqm2gl11sv";
   };
 
   meta = with stdenv.lib; {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c49aeeda5279..9929b4e94846 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -996,6 +996,8 @@ with pkgs;
 
   hr = callPackage ../applications/misc/hr { };
 
+  icdiff = callPackage ../tools/text/icdiff {};
+
   interlock = callPackage ../servers/interlock {};
 
   jbuilder = callPackage ../development/tools/ocaml/jbuilder { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 4093dac55c84..000b1c572a63 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12610,8 +12610,6 @@ in {
     };
   };
 
-  icdiff = callPackage ../tools/text/icdiff {};
-
   imageio = buildPythonPackage rec {
     name = "imageio-${version}";
     version = "1.6";