diff --git a/Jenkinsfile b/Jenkinsfile
index be85bad..4cccbac 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -252,7 +252,6 @@ def get_capyscheme_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -292,7 +291,6 @@ def get_chibi_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -332,7 +330,6 @@ def get_chicken_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -372,7 +369,6 @@ def get_cyclone_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -412,7 +408,6 @@ def get_foment_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -452,7 +447,6 @@ def get_gauche_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -492,7 +486,6 @@ def get_kawa_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -532,7 +525,6 @@ def get_loko_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -572,7 +564,6 @@ def get_meevax_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -612,7 +603,6 @@ def get_mit_scheme_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -652,7 +642,6 @@ def get_mosh_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -692,7 +681,6 @@ def get_racket_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -732,7 +720,6 @@ def get_sagittarius_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -772,7 +759,6 @@ def get_skint_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -812,7 +798,6 @@ def get_stklos_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -852,7 +837,6 @@ def get_tr7_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
@@ -892,7 +876,6 @@ def get_ypsilon_stages() {
   def stages = []
   stages.plus(stage('init') {
     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-      sh "echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
       sh "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
       sh "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
       sh "make -j8 -C chibi-scheme"
diff --git a/makings.scm b/makings.scm
index 3fb22c9..5806164 100644
--- a/makings.scm
+++ b/makings.scm
@@ -5,8 +5,7 @@
       (libraries
         '("tap" "mouth" "debug" "hardware-info" "lambda-utils"))
       (init
-        '("echo 'deb https://mirror.hetzner.com/debian/packages trixie main contrib' > /etc/apt/sources.list.d/debian.sources"
-          "apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
+        '("apt-get update && apt-get install -y git ca-certificates gcc make libffi-dev"
           "git clone https://github.com/ashinn/chibi-scheme.git --depth=1 || true"
           "make -j8 -C chibi-scheme"
           "make -j8 -C chibi-scheme install"