diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a64e3bd..dbd8f25 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -55,7 +55,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip3 install -r .[dev]
+          pip3 install .[dev]
 
       - name: Check format
         run: ./scripts/lint.sh check_format
diff --git a/transactron/core/manager.py b/transactron/core/manager.py
index cfbc6b1..8d0226a 100644
--- a/transactron/core/manager.py
+++ b/transactron/core/manager.py
@@ -30,7 +30,7 @@ class MethodMap:
     def __init__(self, transactions: Iterable["Transaction"]):
         self.methods_by_transaction = dict[Transaction, list[Method]]()
         self.transactions_by_method = defaultdict[Method, list[Transaction]](list)
-        self.readiness_by_call = dict[tuple[Transaction, Method], ValueLike]()
+        self.argument_by_call = dict[tuple[Transaction, Method], MethodStruct]()
         self.ancestors_by_call = dict[tuple[Transaction, Method], tuple[Method, ...]]()
         self.method_parents = defaultdict[Method, list[TransactionBase]](list)
 
@@ -42,7 +42,7 @@ def rec(transaction: Transaction, source: TransactionBase, ancestors: tuple[Meth
                     raise RuntimeError(f"Method '{method.name}' can't be called twice from the same transaction")
                 self.methods_by_transaction[transaction].append(method)
                 self.transactions_by_method[method].append(transaction)
-                self.readiness_by_call[(transaction, method)] = method._validate_arguments(arg_rec)
+                self.argument_by_call[(transaction, method)] = arg_rec
                 self.ancestors_by_call[(transaction, method)] = new_ancestors = (method, *ancestors)
                 rec(transaction, method, new_ancestors)
 
@@ -340,7 +340,7 @@ def elaborate(self, platform):
 
         for transaction in self.transactions:
             ready = [
-                method_map.readiness_by_call[transaction, method]
+                method._validate_arguments(method_map.argument_by_call[transaction, method])
                 for method in method_map.methods_by_transaction[transaction]
             ]
             m.d.comb += transaction.runnable.eq(Cat(ready).all())