diff --git a/.drone.yml b/.drone.yml
index 027fb7d..043486f 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -9,6 +9,7 @@ steps:
     environment:
       PY_COLORS: "1"
     commands:
+      - apk add --no-cache build-base
       - pip install tox -q
       - tox -e $(tox -l | grep py27* | xargs | sed 's/ /,/g') -q
     when:
@@ -22,6 +23,7 @@ steps:
     environment:
       PY_COLORS: "1"
     commands:
+      - apk add --no-cache build-base
       - pip install tox -q
       - tox -e $(tox -l | grep py35* | xargs | sed 's/ /,/g') -q
     when:
@@ -35,6 +37,7 @@ steps:
     environment:
       PY_COLORS: "1"
     commands:
+      - apk add --no-cache build-base
       - pip install tox -q
       - tox -e $(tox -l | grep py36* | xargs | sed 's/ /,/g') -q
     when:
@@ -48,6 +51,7 @@ steps:
     environment:
       PY_COLORS: "1"
     commands:
+      - apk add --no-cache build-base
       - pip install tox -q
       - tox -e $(tox -l | grep py37* | xargs | sed 's/ /,/g') -q
     when: