diff --git a/pkgs/games/dwarf-fortress/dfhack/default.nix b/pkgs/games/dwarf-fortress/dfhack/default.nix
index ca7ddf4e16b5..2c4e4b6f4230 100644
--- a/pkgs/games/dwarf-fortress/dfhack/default.nix
+++ b/pkgs/games/dwarf-fortress/dfhack/default.nix
@@ -22,24 +22,6 @@ with lib;
 
 let
   dfhack-releases = {
-    "0.43.05" = {
-      dfHackRelease = "0.43.05-r3.1";
-      sha256 = "1ds366i0qcfbn62w9qv98lsqcrm38npzgvcr35hf6ihqa6nc6xrl";
-      xmlRev = "860a9041a75305609643d465123a4b598140dd7f";
-      prerelease = false;
-    };
-    "0.44.05" = {
-      dfHackRelease = "0.44.05-r2";
-      sha256 = "1cwifdhi48a976xc472nf6q2k0ibwqffil5a4llcymcxdbgxdcc9";
-      xmlRev = "2794f8a6d7405d4858bac486a0bb17b94740c142";
-      prerelease = false;
-    };
-    "0.44.09" = {
-      dfHackRelease = "0.44.09-r1";
-      sha256 = "1nkfaa43pisbyik5inj5q2hja2vza5lwidg5z02jyh136jm64hwk";
-      xmlRev = "3c0bf63674d5430deadaf7befaec42f0ec1e8bc5";
-      prerelease = false;
-    };
     "0.44.10" = {
       dfHackRelease = "0.44.10-r2";
       sha256 = "19bxsghxzw3bilhr8sm4axz7p7z8lrvbdsd1vdjf5zbg04rs866i";
diff --git a/pkgs/games/dwarf-fortress/twbt/default.nix b/pkgs/games/dwarf-fortress/twbt/default.nix
index 1188265f7415..311a36da2bf1 100644
--- a/pkgs/games/dwarf-fortress/twbt/default.nix
+++ b/pkgs/games/dwarf-fortress/twbt/default.nix
@@ -9,21 +9,6 @@ with lib;
 
 let
   twbt-releases = {
-    "0.43.05" = {
-      twbtRelease = "6.22";
-      sha256 = "0di5d38f6jj9smsz0wjcs1zav4zba6hrk8cbn59kwpb1wamsh5c7";
-      prerelease = false;
-    };
-    "0.44.05" = {
-      twbtRelease = "6.35";
-      sha256 = "0qjkgl7dsqzsd7pdq8a5bihhi1wplfkv1id7sj6dp3swjpsfxp8g";
-      prerelease = false;
-    };
-    "0.44.09" = {
-      twbtRelease = "6.41";
-      sha256 = "0nsq15z05pbhqjvw2xqs1a9b1n2ma0aalhc3vh3mi4cd4k7lxh44";
-      prerelease = false;
-    };
     "0.44.10" = {
       twbtRelease = "6.49";
       sha256 = "1qjkc7k33qhxj2g18njzasccjqsis5y8zrw5vl90h4rs3i8ld9xz";