diff --git a/api_ping/Dockerfile b/api_ping/Dockerfile
index 1fb9aab..fe406ff 100644
--- a/api_ping/Dockerfile
+++ b/api_ping/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/backfiller/Dockerfile b/backfiller/Dockerfile
index 5ac8da6..1516c60 100644
--- a/backfiller/Dockerfile
+++ b/backfiller/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/cutter/Dockerfile b/cutter/Dockerfile
index 29f540b..7e33b19 100644
--- a/cutter/Dockerfile
+++ b/cutter/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/downloader/Dockerfile b/downloader/Dockerfile
index d6b57ca..3c0ff11 100644
--- a/downloader/Dockerfile
+++ b/downloader/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/restreamer/Dockerfile b/restreamer/Dockerfile
index 6d3d798..0522150 100644
--- a/restreamer/Dockerfile
+++ b/restreamer/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/segment_coverage/Dockerfile b/segment_coverage/Dockerfile
index d92854f..9a99796 100644
--- a/segment_coverage/Dockerfile
+++ b/segment_coverage/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/sheetsync/Dockerfile b/sheetsync/Dockerfile
index 0190a50..082bf97 100644
--- a/sheetsync/Dockerfile
+++ b/sheetsync/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent
diff --git a/thrimshim/Dockerfile b/thrimshim/Dockerfile
index 6e3ccb8..be27120 100644
--- a/thrimshim/Dockerfile
+++ b/thrimshim/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.7
 # dependencies needed for compiling c extensions
 # also busybox-extras for telnet for easier use of backdoor
-RUN apk --update add py2-pip gcc python-dev musl-dev busybox-extras
+RUN apk --update add py2-pip gcc python-dev musl-dev file make busybox-extras
 
 # Install gevent so that we don't need to re-install it when common changes
 RUN pip install gevent