diff --git a/requirements.txt b/requirements.txt
index 1b0df5e..46b4e99 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@
 setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 
 # Build requirements
-charm-tools>=2.4.4,<2.8
+charm-tools==2.8.3
 
 # Workaround until https://github.com/juju/charm-tools/pull/589 gets
 # published
diff --git a/tox.ini b/tox.ini
index c91922e..ce79fa1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -28,7 +28,7 @@ deps =
 [testenv:build]
 basepython = python3
 commands =
-    charm-build --log-level DEBUG -o {toxinidir}/build src {posargs}
+    charm-build --log-level DEBUG -o {toxinidir}/build/builds src {posargs}
 
 [testenv:py3]
 basepython = python3