diff --git a/pkgs/development/interpreters/tcl/9.0.nix b/pkgs/development/interpreters/tcl/9.0.nix
index 48a9570675a1a..30108004c3183 100644
--- a/pkgs/development/interpreters/tcl/9.0.nix
+++ b/pkgs/development/interpreters/tcl/9.0.nix
@@ -4,13 +4,13 @@ callPackage ./generic.nix (
   args
   // rec {
     release = "9.0";
-    version = "${release}.0";
+    version = "${release}.1";
 
     # Note: when updating, the hash in pkgs/development/libraries/tk/9.0.nix must also be updated!
 
     src = fetchzip {
       url = "mirror://sourceforge/tcl/tcl${version}-src.tar.gz";
-      sha256 = "sha256-QaPSY6kfxyc3x+2ptzEmN2puZ0gSFSeeNjPuxsVKXYE=";
+      hash = "sha256-NWwCQGyaUzfTgHqpib4lLeflULWKuLE4qYxP+0EizHs=";
     };
   }
 )
diff --git a/pkgs/development/libraries/tk/9.0.nix b/pkgs/development/libraries/tk/9.0.nix
index ff99ca8b4f63e..671fa80ed8bc0 100644
--- a/pkgs/development/libraries/tk/9.0.nix
+++ b/pkgs/development/libraries/tk/9.0.nix
@@ -11,7 +11,7 @@ callPackage ./generic.nix (
 
     src = fetchzip {
       url = "mirror://sourceforge/tcl/tk${tcl.version}-src.tar.gz";
-      sha256 = "sha256-jQ9kZuFx6ikQ+SpY7kSbvXJ5hjw4WB9VgRaNlQLtG0s=";
+      hash = "sha256-eX9HSPnNHeWkCaH0TBhmxQ3keTb4he3KY5rS1w4ubTo=";
     };
 
     patches = [
diff --git a/pkgs/development/libraries/tk/generic.nix b/pkgs/development/libraries/tk/generic.nix
index dfe14f22ec45c..73d37d55db936 100644
--- a/pkgs/development/libraries/tk/generic.nix
+++ b/pkgs/development/libraries/tk/generic.nix
@@ -87,6 +87,6 @@ tcl.mkTclDerivation {
     platforms = platforms.all;
     maintainers = [ ];
     broken = stdenv.hostPlatform.isDarwin
-      && lib.elem (lib.versions.majorMinor tcl.version) ["8.5" "9.0"];
+      && lib.elem (lib.versions.majorMinor tcl.version) ["8.5"];
   };
 }