diff --git a/.builds/guix.yml b/.builds/guix.yml
index dd61f4832af63d5ff54fa418847a86229a217cfa..ae2c90fae6d4c475459dad85dfb656e53b58a580 100644
--- a/.builds/guix.yml
+++ b/.builds/guix.yml
@@ -1,45 +1,34 @@
-image: debian/unstable
+image: guix
+packages:
+- plzip
 sources:
 - https://git.sr.ht/~singpolyma/jmp-pay
-packages:
-- guix
-- xz-utils
-environment:
-  GUIX_PROFILE: /var/guix/profiles/per-user/root/guix-profile
-  CID: QmRpV6qo68sC3ZCwdZT4qcARw5jUWM6ixSEyxv5ojkhVca
-  TARNAME: 2kld8phgqyr21daa2j4aq3nv4zmmrm2y-guix-tarball-pack.tar.xz
 secrets:
 - 9ded4157-4cf9-42ae-b7d0-55eb6e52ea37
 - fd52c9ce-04e8-4684-af6c-1ab78d2e124a
 artifacts:
 - jmp-pay.scm
-- jmp-pay.nar.xz
+- jmp-pay.nar.lz
 tasks:
-- pull: |
-    curl -O https://cloudflare-ipfs.com/ipfs/$CID/$TARNAME
-    sudo systemctl stop guix-daemon
-    sudo tar -C / -xJf $TARNAME
-    sudo /sbin/start-stop-daemon -Sbmp /tmp/guix-daemon.pid -a $GUIX_PROFILE/bin/guix-daemon -- --build-users-group=_guixbuild
 - bake: |
-    . $GUIX_PROFILE/etc/profile
-    hash guix
-    sed '/^;;;;$/q' jmp-pay/jmp-pay.scm > jmp-pay.scm
+    printf "(define-module (jmp-pay))\n" > jmp-pay.scm
+    sed '/^;;;;$/q' jmp-pay/guix.scm >> jmp-pay.scm
     printf "(define-public jmp-pay\n\t" >> jmp-pay.scm
     cd jmp-pay
-    printf "(use-modules (jmp-pay))\n(write jmp-pay-baked)\n" | guix repl -L. /dev/stdin >> ../jmp-pay.scm
+    printf '(load "%s/guix.scm")\n(write jmp-pay-baked)\n' "$(pwd)" | guix repl /dev/stdin >> ../jmp-pay.scm
     cd -
-    printf ")" >> jmp-pay.scm
-    rm -rf jmp-pay
+    printf ")\n" >> jmp-pay.scm
+    rm -f jmp-pay/guix.scm
+    [ "$BUILD_REASON" = patchset ] || rm -rf jmp-pay
 - build: |
-    . "$GUIX_PROFILE/etc/profile"
-    hash guix
-    guix build --no-grafts -L. jmp-pay
+    if [ "$BUILD_REASON" = patchset ]; then with_source="--with-source=$PWD/jmp-pay"; fi
+    guix build $with_source --no-grafts -r out -L. jmp-pay
 - archive: |
-    . "$GUIX_PROFILE/etc/profile"
-    hash guix
-    sudo mv signing-key.pub /etc/guix/
-    sudo mv signing-key.sec /etc/guix/
-    sudo chown root:root /etc/guix/signing-key.sec
-    sudo chmod 0400 /etc/guix/signing-key.sec
-    guix archive --export -r --no-grafts -L. jmp-pay > jmp-pay.nar
-    xz jmp-pay.nar
+    if [ -e signing-key.sec ]; then
+      sudo mv signing-key.pub /etc/guix/
+      sudo mv signing-key.sec /etc/guix/
+      sudo chown root:root /etc/guix/signing-key.sec
+      sudo chmod 0400 /etc/guix/signing-key.sec
+    fi
+    guix archive --export -r --no-grafts $(readlink -f out) > jmp-pay.nar
+    plzip jmp-pay.nar