diff --git a/.github/conda/meta.yaml b/.github/conda/meta.yaml
index 087967b..d561b6b 100644
--- a/.github/conda/meta.yaml
+++ b/.github/conda/meta.yaml
@@ -23,7 +23,9 @@ requirements:
 build:
   number: {{ build }}
   noarch: python
-  script: python -m pip install --no-deps --ignore-installed .
+  script: python setup.py install --single-version-externally-managed --record record.txt
+  entry_points:
+  - telingo = telingo:main
 
 
 about:
diff --git a/.github/deploy.yml b/.github/deploy.yml
index e0fc66c..8a3ba83 100644
--- a/.github/deploy.yml
+++ b/.github/deploy.yml
@@ -44,7 +44,9 @@ conda:
           - clingo >=5.5.0
       build:
         noarch: python
-        script: 'python -m pip install --no-deps --ignore-installed .'
+        script: 'python setup.py install --single-version-externally-managed --record record.txt'
+        entry_points:
+          - telingo = telingo:main
       about:
         home: https://potassco.org/
         license: MIT
diff --git a/telingo/__init__.py b/telingo/__init__.py
index 29f3933..7e7b21f 100644
--- a/telingo/__init__.py
+++ b/telingo/__init__.py
@@ -15,6 +15,7 @@
 
 import sys as _sys
 import clingo as _clingo
+import clingo.ast as _ast
 import textwrap as _textwrap
 
 def imain(prg, future_sigs, program_parts, on_model, imin = 0, imax = None, istop = "SAT"):
@@ -85,7 +86,7 @@ def __init__(self):
         See clingo.clingo_main().
         """
         self.program_name = "telingo"
-        self.version = "2.1.0"
+        self.version = "2.1.1"
 
         self.__imin = 0
         self.__imax = None
@@ -163,7 +164,7 @@ def main(self, prg, files):
         This function implements the Application.main() function as required by
         clingo.clingo_main().
         """
-        with prg.builder() as b:
+        with _ast.ProgramBuilder(prg) as b:
             files = [open(f) for f in files]
             if len(files) == 0:
                 files.append(_sys.stdin)