diff --git a/pkgs/development/libraries/haskell/stm/2.1.1.2.nix b/pkgs/development/libraries/haskell/stm/2.1.1.2.nix
deleted file mode 100644
index d69827bbb69..00000000000
--- a/pkgs/development/libraries/haskell/stm/2.1.1.2.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "stm";
-  version = "2.1.1.2";
-  sha256 = "68d550067ae180373142c51f3fa14bdf0a1516310aee9a37e28f9ac7cf3b8c6d";
-  meta = {
-    description = "Software Transactional Memory";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/stm/2.1.2.1.nix b/pkgs/development/libraries/haskell/stm/2.1.2.1.nix
deleted file mode 100644
index ab99000b7e7..00000000000
--- a/pkgs/development/libraries/haskell/stm/2.1.2.1.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "stm";
-  version = "2.1.2.1";
-  sha256 = "0d7d8babd2f07c726909030461e1f9b3aaf02dc809fd5e1c0509a67d23b784b8";
-  meta = {
-    description = "Software Transactional Memory";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/stm/2.2.0.1.nix b/pkgs/development/libraries/haskell/stm/2.2.0.1.nix
deleted file mode 100644
index cfe7ff65871..00000000000
--- a/pkgs/development/libraries/haskell/stm/2.2.0.1.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "stm";
-  version = "2.2.0.1";
-  sha256 = "1p0x414ffsd77mmlfz1cmwg2cbhinnbpxypxgvygg05js67msj8q";
-  meta = {
-    description = "Software Transactional Memory";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/stm/2.3.nix b/pkgs/development/libraries/haskell/stm/2.3.nix
deleted file mode 100644
index c5f62c9c827..00000000000
--- a/pkgs/development/libraries/haskell/stm/2.3.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "stm";
-  version = "2.3";
-  sha256 = "1321l1qkmvnqdw73i21jnh2b8c1iw1mxjbp23hmqdvljjb9mlzsm";
-  meta = {
-    description = "Software Transactional Memory";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/stm/2.4.nix b/pkgs/development/libraries/haskell/stm/2.4.nix
deleted file mode 100644
index 6007e845e9b..00000000000
--- a/pkgs/development/libraries/haskell/stm/2.4.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "stm";
-  version = "2.4";
-  sha256 = "13flyzh2vnqnap78qjawdh3150rmp9bxnlgynsf793lm1b3z15fl";
-  meta = {
-    description = "Software Transactional Memory";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index fc503cdc213..6a0473e501c 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2368,11 +2368,6 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   stbImage = callPackage ../development/libraries/haskell/stb-image {};
 
-  stm_2_1_1_2 = callPackage ../development/libraries/haskell/stm/2.1.1.2.nix {};
-  stm_2_1_2_1 = callPackage ../development/libraries/haskell/stm/2.1.2.1.nix {};
-  stm_2_2_0_1 = callPackage ../development/libraries/haskell/stm/2.2.0.1.nix {};
-  stm_2_3 = callPackage ../development/libraries/haskell/stm/2.3.nix {};
-  stm_2_4 = callPackage ../development/libraries/haskell/stm/2.4.nix {};
   stm_2_4_2 = callPackage ../development/libraries/haskell/stm/2.4.2.nix {};
   stm_2_4_3 = callPackage ../development/libraries/haskell/stm/2.4.3.nix {};
   stm = self.stm_2_4_3;