diff --git a/Dockerfile.alpine b/Dockerfile.alpine
deleted file mode 100644
index 42fe590..0000000
--- a/Dockerfile.alpine
+++ /dev/null
@@ -1,5 +0,0 @@
-FROM alpine:latest
-RUN apk add guix
-RUN mkdir -p ${HOME}/.config/guix
-RUN echo "(cons (channel (name 'snow-fort) (url \"https://gitea.scheme.org/Rinne/snow-fort-guix-channel.git\")) %default-channels)" > ${HOME}/.config/guix/channels.scm
-RUN guix-daemon & guix pull
diff --git a/Dockerfile.debian b/Dockerfile.debian
deleted file mode 100644
index ba13392..0000000
--- a/Dockerfile.debian
+++ /dev/null
@@ -1,5 +0,0 @@
-FROM debian:stable-slim
-RUN apt update && apt install -y guix
-RUN mkdir -p ${HOME}/.config/guix
-RUN echo "(cons (channel (name 'snow-fort) (url \"https://gitea.scheme.org/Rinne/snow-fort-guix-channel.git\")) %default-channels)" > ${HOME}/.config/guix/channels.scm
-RUN guix-daemon & guix pull
diff --git a/Makefile b/Makefile
index d8e0895..a5cc48e 100644
--- a/Makefile
+++ b/Makefile
@@ -3,19 +3,13 @@ TMPDIR=/tmp/snow-fort-guix-channel
 build: repo.scm
 	mkdir -p ${TMPDIR}/hashes
 	./get-package-urls > ${TMPDIR}/package-urls.txt
-	sh ensure-hashes.sh ${TMPDIR}/hashes ${TMPDIR}/package-urls.txt
+	./ensure-hashes ${TMPDIR}/hashes ${TMPDIR}/package-urls.txt
 	mkdir -p packages
 	./build-repo ${TMPDIR}
 
 repo.scm:
 	wget https://snow-fort.org/s/repo.scm
 
-test-debian:
-	docker build . -f Dockerfile.debian
-
-test-alpine:
-	docker build . -f Dockerfile.alpine
-
 clean:
 	rm -rf packages
 
diff --git a/ensure-hashes.sh b/ensure-hashes
old mode 100644
new mode 100755
similarity index 92%
rename from ensure-hashes.sh
rename to ensure-hashes
index 4c126cd..e12ea4e
--- a/ensure-hashes.sh
+++ b/ensure-hashes
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 TMPDIR=${1}