diff --git a/pkgs/development/python-modules/hassil/default.nix b/pkgs/development/python-modules/hassil/default.nix
index bbbe26faccb9..84800b51381a 100644
--- a/pkgs/development/python-modules/hassil/default.nix
+++ b/pkgs/development/python-modules/hassil/default.nix
@@ -2,6 +2,9 @@
 , buildPythonPackage
 , fetchPypi
 
+# build
+, antlr4
+
 # propagates
 , antlr4-python3-runtime
 , dataclasses-json
@@ -13,7 +16,7 @@
 
 let
   pname = "hassil";
-  version = "0.1.3";
+  version = "0.1.4";
 in
 buildPythonPackage {
   inherit pname version;
@@ -21,11 +24,17 @@ buildPythonPackage {
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-KWkzHWMo50OIrZ2kwFhhqDSleFFkAD7/JugjvSyCkww=";
+    hash = "sha256-ygaPdfH2jBk2xvlgt7V8/VcZAtv6Lwsi8g+stK/DdT8=";
   };
 
+  nativeBuildInputs = [
+    antlr4
+  ];
+
   postPatch = ''
     sed -i 's/antlr4-python3-runtime==.*/antlr4-python3-runtime/' requirements.txt
+    rm hassil/grammar/*.{tokens,interp}
+    antlr -Dlanguage=Python3 -visitor -o hassil/grammar/ *.g4
   '';
 
   propagatedBuildInputs = [
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e33e06d48e64..74e36bc868e2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7958,6 +7958,8 @@ with pkgs;
 
   haskell-language-server = callPackage ../development/tools/haskell/haskell-language-server/withWrapper.nix { };
 
+  hassil = with python3Packages; toPythonApplication hassil;
+
   hasmail = callPackage ../applications/networking/mailreaders/hasmail { };
 
   haste-client = callPackage ../tools/misc/haste-client { };