diff --git a/pkgs/applications/misc/pdfstudio/common.nix b/pkgs/applications/misc/pdfstudio/common.nix
index f6ee41786950..17bbd6dfc889 100644
--- a/pkgs/applications/misc/pdfstudio/common.nix
+++ b/pkgs/applications/misc/pdfstudio/common.nix
@@ -5,6 +5,7 @@
 , version
 , desktopName
 , longDescription
+, broken ? false
 , buildFHSEnv
 , extraBuildInputs ? [ ]
 , jdk
@@ -94,6 +95,7 @@ buildFHSEnv {
     ];
     license = licenses.unfree;
     platforms = platforms.linux;
+    inherit broken;
     mainProgram = pname;
     maintainers = [ maintainers.pwoelfel ];
   };
diff --git a/pkgs/applications/misc/pdfstudio/default.nix b/pkgs/applications/misc/pdfstudio/default.nix
index b5d49aa90212..cc7f0cb90667 100644
--- a/pkgs/applications/misc/pdfstudio/default.nix
+++ b/pkgs/applications/misc/pdfstudio/default.nix
@@ -40,6 +40,8 @@ in
       sha256 = "sha256-cc8YjrMsYZqgmwp5+AA+HsqzjxzFcTT/ga31NQz/OWc=";
     };
     jdk = jdk11;
+
+    broken = true; # Bad hash, probably unstable
   };
 
   pdfstudio2021 = callPackage ./common.nix rec {
@@ -66,5 +68,7 @@ in
       (lib.getLib stdenv.cc.cc)  # for libstdc++.so.6 and libgomp.so.1
     ];
     jdk = jdk17;
+
+    broken = true; # URL 404s, probably unstable
   };
 }.${pname}