diff --git a/pkgs/tools/misc/gammy/default.nix b/pkgs/tools/misc/gammy/default.nix
index 61430c3e41ed..a5da79950210 100644
--- a/pkgs/tools/misc/gammy/default.nix
+++ b/pkgs/tools/misc/gammy/default.nix
@@ -2,7 +2,7 @@
 
 let
   pname = "gammy";
-  version = "0.9.58";
+  version = "0.9.58a";
 in
 
 stdenv.mkDerivation {
@@ -12,22 +12,13 @@ stdenv.mkDerivation {
     owner = "Fushko";
     repo = pname;
     rev = "v${version}";
-    sha256 = "02f19b7acrzip4kbfjgqk06xv1c257rq77khpdg5gz0ai6ayvwm8";
+    sha256 = "02kwfzh7h2dbsfb6b3qlsc7zga1hq21qvg45wf22vm03mahc28za";
   };
 
   nativeBuildInputs = [ qmake wrapQtAppsHook ];
 
   buildInputs = [ libXxf86vm ];
 
-  # FIXME remove when https://github.com/Fushko/gammy/issues/45 is fixed
-  installPhase = ''
-    runHook preInstall
-
-    install gammy -Dt $out/bin/
-
-    runHook postInstall
-  '';
-
   meta = with stdenv.lib; {
     description = "GUI tool for manual- of auto-adjusting of brightness/temperature";
     homepage = "https://github.com/Fushko/gammy";