diff --git a/3.12.1/Dockerfile b/3.12.1/Dockerfile
deleted file mode 100644
index b688a5d..0000000
--- a/3.12.1/Dockerfile
+++ /dev/null
@@ -1,17 +0,0 @@
-FROM debian:wheezy
-
-MAINTAINER Jo Shields <jo.shields@xamarin.com>
-
-#based on dockerfile by Michael Friis <friism@gmail.com>
-
-RUN apt-get update \
-	&& apt-get install -y curl \
-	&& rm -rf /var/lib/apt/lists/*
-
-RUN apt-key adv --keyserver pgp.mit.edu --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
-
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy/snapshots/3.12.0 main" > /etc/apt/sources.list.d/mono-xamarin.list \
-        && echo "deb http://download.mono-project.com/repo/debian 312-security main" >> /etc/apt/sources.list.d/mono-xamarin.list \
-	&& apt-get update \
-	&& apt-get install -y mono-devel ca-certificates-mono fsharp mono-vbnc nuget \
-	&& rm -rf /var/lib/apt/lists/*
diff --git a/generate-stackbrew-library.sh b/generate-stackbrew-library.sh
index 50f495d..0d7bf85 100755
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@@ -12,9 +12,6 @@ aliases=(
 	'4.8.0      -> 4.8.0.524'
 	'4.8        -> 4.8.0.524'
 	'4          -> 4.8.0.524'
-	'3.12.0     -> 3.12.1'
-	'3.12       -> 3.12.1'
-	'3          -> 3.12.1'
 	'latest     -> 5.2.0.215'
 )