diff --git a/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix b/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix
index 6b138ac51029..a16c1284a672 100644
--- a/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix
+++ b/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix
@@ -33,9 +33,11 @@ in buildEnv {
     recreate_dir share
     recreate_dir share/dwarftherapist
     mkdir -p $out/share/dwarftherapist/memory_layouts/linux
+    origmd5=$(cat "${dfHashFile}.orig" | cut -c1-8)
+    patchedmd5=$(cat "${dfHashFile}" | cut -c1-8)
     substitute \
       ${dt.layouts}/${inifile} \
       $out/share/dwarftherapist/memory_layouts/${inifile} \
-      --replace $(cat "${dfHashFile}.orig") $(cat "${dfHashFile}.patched")
+      --replace "$origmd5" "$patchedmd5"
   '';
 }
diff --git a/pkgs/games/dwarf-fortress/game.nix b/pkgs/games/dwarf-fortress/game.nix
index 06154e1e57a0..7e0c1b34af74 100644
--- a/pkgs/games/dwarf-fortress/game.nix
+++ b/pkgs/games/dwarf-fortress/game.nix
@@ -26,19 +26,15 @@ stdenv.mkDerivation {
     rm $out/libs/lib*
 
     # Store the original hash
-    orig_hash=$(md5sum $out/libs/Dwarf_Fortress | awk '{ print $1 }')
-    echo $orig_hash | cut -c1-8 > $out/hash.md5.orig  # for dwarf-therapist
-    echo $orig_hash > $out/full-hash-orig.md5  # for dfhack
+    md5sum $out/libs/Dwarf_Fortress | awk '{ print $1 }' > $out/hash.md5.orig
 
     patchelf \
       --set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker) \
       --set-rpath "${libpath}" \
       $out/libs/Dwarf_Fortress
 
-    # Store new hash
-    patched_hash=$(md5sum $out/libs/Dwarf_Fortress | awk '{ print $1 }')
-    echo $patched_hash | cut -c1-8 > $out/hash.md5.patched  # for dwarf-therapist
-    echo $patched_hash > $out/full-hash-patched.md5  # for dfhack
+    # Store the new hash
+    md5sum $out/libs/Dwarf_Fortress | awk '{ print $1 }' > $out/hash.md5
   '';
 
   passthru = { inherit baseVersion patchVersion dfVersion; };
diff --git a/pkgs/games/dwarf-fortress/wrapper/default.nix b/pkgs/games/dwarf-fortress/wrapper/default.nix
index 95ff0821d708..5493cdb3faf6 100644
--- a/pkgs/games/dwarf-fortress/wrapper/default.nix
+++ b/pkgs/games/dwarf-fortress/wrapper/default.nix
@@ -30,8 +30,8 @@ let
       fi
       rm $out/hack/symbols.xml
       substitute ${dfhack}/hack/symbols.xml $out/hack/symbols.xml \
-        --replace $(cat ${dwarf-fortress-original}/full-hash-orig.md5) \
-                  $(cat ${dwarf-fortress-original}/full-hash-patched.md5)
+        --replace $(cat ${dwarf-fortress-original}/hash.md5.orig) \
+                  $(cat ${dwarf-fortress-original}/hash.md5)
     '';
   };
 in