diff --git a/Dockerfile b/Dockerfile
index b78f88ed780c195a60cef14407e69825dec3b690..5e14068bc6d689f2bccec37d1cb5654f90b79657 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,7 +30,7 @@ WORKDIR /builder
 ENV PYENV_ROOT "/builder/.pyenv"
 USER builder
 RUN git clone https://github.com/pyenv/pyenv.git /builder/.pyenv && \
-    export PATH=$PYENV_ROOT/bin:$PATH
+    export PATH=$PYENV_ROOT/bin:$PATH && \
     PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --force 3.5.5 && \
     PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --force 3.6.4