diff --git a/.gitignore b/.gitignore
index 9e55ce3..6e4266f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,3 @@
 __pycache__/
 *.py[cod]
 *$py.class
-
-packages/
-pkgbuilds/
-output/
-run.sh
diff --git a/config.yaml b/config.yaml
index 0072186..abbd89c 100644
--- a/config.yaml
+++ b/config.yaml
@@ -3,4 +3,9 @@ repo:
   db_name: "casio.db"
   arch: "x86_64"
 
-maintainer: "Eldeberen <eldeberen.aur@middleearth.fr>"
+chroot:
+  pacman: "/etc/pacman.conf"
+  makepkg: "/etc/makepkg.conf"
+
+templates: "./pkgtmpl"
+pkgbuilds: "/home/eldeberen/tmp/pkgbuild"
diff --git a/middlearch/__main__.py b/middlearch/__main__.py
index eeefefd..92a1663 100644
--- a/middlearch/__main__.py
+++ b/middlearch/__main__.py
@@ -2,14 +2,18 @@
 
 import argparse, logging
 import os.path as path
-from config import Config, make_chroot
+
+from chroot import Chroot
+from config import Config
+from package import Package
+from repository import Repository
 
 
 parser = argparse.ArgumentParser(description='Build some packages.')
-parser.add_argument('-c', metavar='config', dest="config",
+parser.add_argument('-c', '--config', dest='config_dir',
     default="/etc/middlearch",
     help="configuration directory")
-parser.add_argument('--verbose', '-v', action='count', default=0)
+parser.add_argument('-v', '--verbose', action='count', default=0)
 
 args = parser.parse_args()
 
@@ -17,6 +21,12 @@ verbosities = [logging.WARNING, logging.INFO, logging.DEBUG]
 logging.basicConfig(format="[%(asctime)s] %(levelname)s (%(filename)s.%(funcName)s): %(message)s",
     level=verbosities[min(args.verbose, len(verbosities)-1)])
 
-config = Config(args.config)
+config = Config(args.config_dir)
+repository = Repository(**config.get('repo'))
+packages = Package.load(args.config_dir, repository)
+#chroot = Chroot(config)
 
-make_chroot(args.config)
+for package in packages:
+    package.render_pkgbuild(config)
+#     if package.build:
+#         chroot.makepkg(package, config)
diff --git a/middlearch/chroot.py b/middlearch/chroot.py
new file mode 100644
index 0000000..146e6b7
--- /dev/null
+++ b/middlearch/chroot.py
@@ -0,0 +1,31 @@
+import logging, os, tempfile
+import os.path as path
+
+
+class Chroot(object):
+    def __init__(self, config):
+        # Create directories
+        self.basedir = tempfile.mkdtemp()
+        rootdir = path.join(self.basedir, "root")
+        logging.info(f"created temporary directory in {self.basedir}")
+
+        # Initialize base-devel packages
+        pacman = f"-C {p}" if (p := config.get('chroot.pacman')) else ""
+        makepkg = f"-M {p}" if (p := config.get('chroot.makepkg')) else ""
+        _exec(f"mkarchroot {pacman} {makepkg} {rootdir} base-devel")
+
+        # Make sure everything is up-to-date
+        _exec(f"arch-nspawn {rootdir} pacman -Syu")
+
+        logging.info("chroot initialized")
+
+    def makepkg(self, package, config):
+        current_dir = os.getcwd()
+        os.chdir(path.join(config.get('pkgbuilds'), package.name))
+        _exec(f"makechrootpkg -c -r {self.basedir}")
+        os.chdir(current_dir)
+
+def _exec(cmd):
+    logging.info(cmd)
+    r = os.popen(cmd)
+    logging.debug(r.read())
diff --git a/middlearch/config.py b/middlearch/config.py
new file mode 100644
index 0000000..961bd73
--- /dev/null
+++ b/middlearch/config.py
@@ -0,0 +1,22 @@
+import logging
+import os
+import os.path as path
+import yaml
+
+
+class Config(object):
+    def __init__(self, config_dir):
+        with open(path.join(config_dir, "config.yaml")) as file:
+            self.conf = yaml.load(file, Loader=yaml.SafeLoader)
+            logging.info(f"{path.join(config_dir, 'config.yaml')} loaded")
+        logging.debug('configuration:\n'+yaml.dump(self.conf))
+
+    def get(self, key, default=None):
+        v = self.conf
+        for k in key.split("."):
+            try:
+                v = v[k]
+            except KeyError:
+                logging.debug(f"{key} not found")
+                return default
+        return v
diff --git a/middlearch/config/__init__.py b/middlearch/config/__init__.py
deleted file mode 100644
index 7df46ac..0000000
--- a/middlearch/config/__init__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from .config import Config
-from .chroot import make_chroot
diff --git a/middlearch/config/chroot.py b/middlearch/config/chroot.py
deleted file mode 100644
index df75bc1..0000000
--- a/middlearch/config/chroot.py
+++ /dev/null
@@ -1,21 +0,0 @@
-import logging, os, tempfile
-import os.path as path
-
-
-def make_chroot(configdir):
-    # Create directories
-    basedir = tempfile.mkdtemp()
-    rootdir = path.join(basedir, "root")
-    logging.info(f"created temporary directory in {basedir}")
-
-    # Initialize base-devel packages
-    pacman = path.join(configdir, "pacman.conf")
-    makepkg = path.join(configdir, "makepkg.conf")
-    r = os.popen(f"mkarchroot -C {pacman} -M {makepkg} {rootdir} base-devel")
-    logging.debug(r.read())
-
-    # Make sure everything is up-to-date
-    r = os.popen(f"arch-nspawn {rootdir} pacman -Syu")
-    logging.debug(r.read())
-
-    logging.info("chroot initialized")
diff --git a/middlearch/config/config.py b/middlearch/config/config.py
deleted file mode 100644
index 298204f..0000000
--- a/middlearch/config/config.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import logging
-import os, shutil
-import yaml
-import os.path as path
-
-
-class Config():
-    def __init__(self, config_dir):
-        with open(path.join(config_dir, "config.yaml")) as file:
-            self.params = yaml.load(file, Loader=yaml.SafeLoader)
-            logging.info(f"{path.join(config_dir, 'config.yaml')} loaded")
-            logging.debug('\n'+yaml.dump(self.params))
-        with open(path.join(config_dir, "packages.yaml")) as file:
-            self.packages = yaml.load(file, Loader=yaml.SafeLoader)
-            logging.info(f"{len(self.packages)} packages loaded")
-            logging.debug('\n'+yaml.dump(self.packages))
diff --git a/middlearch/git.py b/middlearch/git.py
new file mode 100644
index 0000000..a551506
--- /dev/null
+++ b/middlearch/git.py
@@ -0,0 +1,28 @@
+import logging
+import os
+import re
+
+
+def get_tag_from_git(remote):
+    if remote is None:
+        logging.warning("cannot retreive tags from None remote")
+        return None
+
+    regex = re.compile("^refs/tags/v?(\d+\.\d+\.\d+)$")
+    def extract_tag(tag):
+        m = regex.search(tag)
+        if m:
+            return m.groups()[0]
+        return ""
+
+    raw_tags = os.popen(f"git ls-remote --tags {remote}").read().split()
+    tags = sorted(
+        list(
+            filter(''.__ne__,
+                map(extract_tag, raw_tags)
+            ),
+        )
+    )
+    logging.debug(f"{remote}: {', '.join(tags)}")
+
+    return tags[-1]
diff --git a/middlearch/package.py b/middlearch/package.py
new file mode 100644
index 0000000..15e0709
--- /dev/null
+++ b/middlearch/package.py
@@ -0,0 +1,87 @@
+import hashlib, logging, os, re
+import jinja2 as j2
+import os.path as path
+import requests as r
+import yaml
+
+from git import get_tag_from_git
+
+class Package(object):
+    def __init__(self, name, **params):
+        self.name = name
+        self.repo = params.get("repo")
+        self.tag = params.get("tag") or get_tag_from_git(self.repo)
+        self.force = params.get("force", False)
+        self.render = params.get("render", True)
+        self.maintainers = params.get("maintainers", {})
+        self.contributors = params.get("contributors", {})
+        self.build = False
+        logging.debug(self)
+
+    def __repr__(self):
+        return f"{self.name} [repo: {self.repo}, tag: {self.tag}, force: {self.force}]"
+
+    def load(config_dir, repository):
+        with open(path.join(config_dir, "packages.yaml")) as file:
+            p_list = yaml.load(file, Loader=yaml.SafeLoader)
+
+        packages = []
+        for p in p_list:
+            package = Package(**p)
+            packages.append(package)
+
+            current_tag = repository.get_package_version(package.name)
+
+            if package.tag > current_tag:
+                logging.info(f"{package.name} will be updated ({current_tag} → {package.tag})")
+                package.build = True
+            elif package.force:
+                logging.info(f"{package.name} will be updated ({package.tag})")
+                package.build = True
+            else:
+                logging.info(f"{package.name} will be skipped")
+
+        logging.info(f"{len(packages)} packages loaded")
+
+        return packages
+
+    def render_pkgbuild(self, config):
+        def get_hash(name, tag):
+            regex = re.compile("^source=.+(https://.+\.tar\.[a-z]+)", re.MULTILINE)
+            with open(f"{config.get('templates', 'templates')}/{name}.j2") as file:
+                content = file.read()
+            try:
+                url = regex.search(content).group(1)
+            except:
+                logging.warning(f"cannot find valid source for {name} (is it a git version?)")
+                return "SKIP"
+            url = url.replace("${pkgver}", tag)
+            url = url.replace("${pkgname}", name)
+
+            archive = r.get(url)
+            hash = hashlib.sha256(archive.content).hexdigest()
+
+            return hash
+
+        env = j2.Environment(
+            loader=j2.FileSystemLoader(config.get('templates', 'templates')),
+            autoescape=j2.select_autoescape([])
+        )
+        template = env.get_template(f"{self.name}.j2")
+        hash = get_hash(self.name, self.tag)
+
+        sysenv = j2.Environment(
+            loader=j2.FileSystemLoader('templates'),
+            autoescape=j2.select_autoescape([])
+        )
+        maintainers_template = sysenv.get_template("maintainers.j2")
+
+        dest_dir = path.join(config.get('pkgbuilds', "pkgbuilds"), self.name)
+        os.makedirs(dest_dir, exist_ok=True)
+
+        with open(f"{config.get('pkgbuilds')}/{self.name}/PKGBUILD", "w") as file:
+            file.write(maintainers_template.render(
+                maintainers=self.maintainers,
+                contributors=self.contributors
+            ))
+            file.write(template.render(name=self.name, tag=self.tag, hash=hash))
diff --git a/middlearch/repository.py b/middlearch/repository.py
new file mode 100644
index 0000000..9189491
--- /dev/null
+++ b/middlearch/repository.py
@@ -0,0 +1,37 @@
+from io import BytesIO
+import logging
+import re
+import requests as r
+import tarfile
+
+
+class Repository(object):
+    def __init__(self, base_url, arch, db_name):
+        self.base_url = base_url
+        self.arch = arch
+        self.db_name = db_name
+        self.db = tarfile.open(fileobj=BytesIO(r.get(self.db_url).content))
+        logging.info(f"{self} loaded")
+
+    @property
+    def db_url(self):
+        return f"{self.base_url}/{self.arch}/{self.db_name}"
+
+    def __repr__(self):
+        return self.db_url
+
+    def get_package_version(self, pkgname):
+        try:
+            name = list(filter(
+                lambda item: item.isdir() and pkgname in item.name,
+                self.db.getmembers()
+            ))[0].name
+        except IndexError:
+            logging.warning(f"{pkgname} is not online")
+            version = "0.0.0"
+        else:
+            regex = re.compile(".+-(\d+\.\d+(?:\.\d+)?)-\d+")
+            version = regex.search(name).group(1)
+            logging.debug(f"{pkgname} is {version} online")
+
+        return version
diff --git a/middlearch/build/template.py b/middlearch/template.py
similarity index 60%
rename from middlearch/build/template.py
rename to middlearch/template.py
index 9dddb22..8b143a5 100644
--- a/middlearch/build/template.py
+++ b/middlearch/template.py
@@ -1,13 +1,9 @@
 import hashlib, logging, os, re
 import jinja2 as j2
+import os.path as path
 import requests as r
 
 
-env = j2.Environment(
-    loader=j2.FileSystemLoader('templates'),
-    autoescape=j2.select_autoescape([])
-)
-
 def get_hash(name, tag):
     regex = re.compile("^source=.+(https://.+\.tar\.[a-z]+)", re.MULTILINE)
     with open(f"templates/{name}.j2") as file:
@@ -24,12 +20,3 @@ def get_hash(name, tag):
     hash = hashlib.sha256(archive.content).hexdigest()
 
     return hash
-
-def render_pkgbuild(name, tag):
-    template = env.get_template(f"{name}.j2")
-    hash = get_hash(name, tag)
-
-    os.mkdir(f"pkgbuilds/{name}")
-
-    with open(f"pkgbuilds/{name}/PKGBUILD", "w") as file:
-        file.write(template.render(tag=tag, hash=hash, maintainer=MAINTAINER))
diff --git a/packages.yaml b/packages.yaml
index 21e3904..cba6d80 100644
--- a/packages.yaml
+++ b/packages.yaml
@@ -1,44 +1,82 @@
 - name: isl
+  tag: "0.24"
+  maintainers:
+    - "Andrew Sun  <adsun701 at gmail dot com>"
+  contributors:
+    - "Kritias     <theodoridisgr at gmail dot com>"
+    - "sudokode    <sudokode at gmail dot com>"
+    - "Allan McRae <allan at archlinux dot org>"
+    - "Eldeberen   <eldeberen at middleearth dot fr>"
+
 - name: sh-elf-binutils-casio
+  tag: "2.37"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
+
 - name: sh-elf-gcc-casio
+  tag: "11.2.0"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
 - name: openlibm-casio
   repo: https://gitea.planet-casio.com/Lephenixnoir/OpenLibm.git
-  force: true
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: mkg3a
-  repo: https://github.com/tari/mkg3a.git
-  force: true
+- name: "mkg3a"
+  repo: "https://github.com/tari/mkg3a.git"
+  maintainers:
+    - "Peter Marheine <peter@taricorp.net>"
+  contributors:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: fxsdk
-  repo: https://gitea.planet-casio.com/Lephenixnoir/fxsdk.git
-  force: true
+- name: "fxsdk"
+  repo: "https://gitea.planet-casio.com/Lephenixnoir/fxsdk.git"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: fxlibc
-  repo: https://gitea.planet-casio.com/Vhex-Kernel-Core/fxlibc.git
-  force: true
+- name: "fxlibc"
+  repo: "https://gitea.planet-casio.com/Vhex-Kernel-Core/fxlibc.git"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: gint
-  repo: https://gitea.planet-casio.com/Lephenixnoir/gint.git
-  force: true
+- name: "gint"
+  repo: "https://gitea.planet-casio.com/Lephenixnoir/gint.git"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: libimg
-  repo: https://gitea.planet-casio.com/Lephenixnoir/libimg.git
-  force: true
+- name: "libimg"
+  repo: "https://gitea.planet-casio.com/Lephenixnoir/libimg.git"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: libprof
-  repo: https://gitea.planet-casio.com/Lephenixnoir/libprof.git
-  force: true
+- name: "libprof"
+  repo: "https://gitea.planet-casio.com/Lephenixnoir/libprof.git"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: justui
-  repo: https://gitea.planet-casio.com/Lephenixnoir/justui.git
-  force: true
+- name: "justui"
+  repo: "https://gitea.planet-casio.com/Lephenixnoir/justui.git"
+  maintainers:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: libp7
+- name: "libp7"
   tag: "3.0"
+  maintainers:
+    - "Breizh <breizh@breizh.pm>"
+  contributors:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: p7
+- name: "p7"
   tag: "3.0"
+  maintainers:
+    - "Breizh <breizh@breizh.pm>"
+  contributors:
+    - "Eldeberen <eldeberen@middleearth.fr>"
 
-- name: p7screen
+- name: "p7screen"
   tag: "3.0"
+  maintainers:
+    - "Breizh <breizh@breizh.pm>"
+  contributors:
+    - "Eldeberen <eldeberen@middleearth.fr>"
diff --git a/templates/fxlibc.j2 b/pkgtmpl/fxlibc.j2
similarity index 91%
rename from templates/fxlibc.j2
rename to pkgtmpl/fxlibc.j2
index 1142601..f349df1 100644
--- a/templates/fxlibc.j2
+++ b/pkgtmpl/fxlibc.j2
@@ -1,12 +1,11 @@
-# Maintainer: {{ maintainer }}
-pkgname=fxlibc
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc="A C standard library for fx Casio calculators, built for gint"
 arch=('i686' 'x86_64')
 url="https://gitea.planet-casio.com/Lephenixnoir/${pkgname}"
 licence=('unkwown')
-depends=('fxsdk')
+depends=('fxsdk' 'openlibm-casio')
 makedepends=('fxsdk')
 options=('!buildflags' '!strip')
 source=("$pkgname-$pkgver.tar.gz::https://gitea.planet-casio.com/Vhex-Kernel-Core/fxlibc/archive/${pkgver}.tar.gz")
diff --git a/templates/fxsdk.j2 b/pkgtmpl/fxsdk.j2
similarity index 96%
rename from templates/fxsdk.j2
rename to pkgtmpl/fxsdk.j2
index 4f248a6..f42d191 100644
--- a/templates/fxsdk.j2
+++ b/pkgtmpl/fxsdk.j2
@@ -1,5 +1,4 @@
-# Maintainer: {{ maintainer }}
-pkgname=fxsdk
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc='Tools to program for the Casio fx9860 calculators'
diff --git a/templates/gint.j2 b/pkgtmpl/gint.j2
similarity index 94%
rename from templates/gint.j2
rename to pkgtmpl/gint.j2
index 0a93197..48e9507 100644
--- a/templates/gint.j2
+++ b/pkgtmpl/gint.j2
@@ -1,5 +1,4 @@
-# Maintainer: {{ maintainer }}
-pkgname=gint
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc='Alternative library and kernel for add-in development on fx-9860G and fx-CG50 under Linux'
diff --git a/pkgtmpl/isl.j2 b/pkgtmpl/isl.j2
new file mode 100644
index 0000000..23cbddf
--- /dev/null
+++ b/pkgtmpl/isl.j2
@@ -0,0 +1,33 @@
+pkgname={{ name }}
+pkgver={{ tag }}
+pkgrel=1
+pkgdesc="Library for manipulating sets and relations of integer points bounded by linear constraints"
+arch=('i686' 'x86_64')
+url="http://isl.gforge.inria.fr/"
+depends=('gmp')
+license=('MIT')
+conflicts=('isl-git' 'isl14' 'isl15' 'isl16' 'isl17')
+source=("http://isl.gforge.inria.fr/isl-${pkgver}.tar.gz")
+sha256sums=('{{ hash }}')
+
+build() {
+  cd ${srcdir}/${pkgname}-${pkgver}
+  ./configure --prefix=/usr
+  make
+}
+
+check() {
+  cd ${srcdir}/${pkgname}-${pkgver}
+  make check || true
+}
+
+package() {
+  cd ${srcdir}/${pkgname}-${pkgver}
+
+  make DESTDIR="$pkgdir" install
+
+  install -dm755 "$pkgdir"/usr/share/gdb/auto-load/usr/lib/
+  mv "$pkgdir"/usr/lib/libisl.so.*-gdb.py "$pkgdir"/usr/share/gdb/auto-load/usr/lib/
+
+  install -Dm644 LICENSE "$pkgdir"/usr/share/licenses/isl/LICENSE
+}
diff --git a/templates/justui.j2 b/pkgtmpl/justui.j2
similarity index 93%
rename from templates/justui.j2
rename to pkgtmpl/justui.j2
index cc97676..37449b0 100644
--- a/templates/justui.j2
+++ b/pkgtmpl/justui.j2
@@ -1,7 +1,6 @@
-# Maintainer: {{ maintainer }}
-pkgname=justui
+pkgname={{ name }}
 pkgver={{ tag }}
-pkgrel=1
+pkgrel=2
 pkgdesc="Lephe's GUI toolkit for gint"
 arch=('i686' 'x86_64')
 url="https://gitea.planet-casio.com/Lephenixnoir/${pkgname}"
diff --git a/templates/libimg.j2 b/pkgtmpl/libimg.j2
similarity index 92%
rename from templates/libimg.j2
rename to pkgtmpl/libimg.j2
index 9ceaf65..84e5719 100644
--- a/templates/libimg.j2
+++ b/pkgtmpl/libimg.j2
@@ -1,7 +1,6 @@
-# Maintainer: {{ maintainer }}
-pkgname=libimg
+pkgname={{ name }}
 pkgver={{ tag }}
-pkgrel=1
+pkgrel=2
 pkgdesc="Lephe's GUI toolkit for gint"
 arch=('i686' 'x86_64')
 url="https://gitea.planet-casio.com/Lephenixnoir/${pkgname}"
diff --git a/templates/libp7.j2 b/pkgtmpl/libp7.j2
similarity index 87%
rename from templates/libp7.j2
rename to pkgtmpl/libp7.j2
index 722fb5a..696bf66 100644
--- a/templates/libp7.j2
+++ b/pkgtmpl/libp7.j2
@@ -1,6 +1,4 @@
-# Maintainer: Breizh <breizh@breizh.pm>
-# Contributor: {{ maintainer }}
-pkgname=libp7
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc="Casio Communication Protocol 7.00 implementation"
diff --git a/templates/libprof.j2 b/pkgtmpl/libprof.j2
similarity index 92%
rename from templates/libprof.j2
rename to pkgtmpl/libprof.j2
index 6b2f0d6..6154788 100644
--- a/templates/libprof.j2
+++ b/pkgtmpl/libprof.j2
@@ -1,7 +1,6 @@
-# Maintainer: {{ maintainer }}
-pkgname=libprof
+pkgname={{ name }}
 pkgver={{ tag }}
-pkgrel=1
+pkgrel=2
 pkgdesc="A microsecond-level performance profiling library for gint"
 arch=('i686' 'x86_64')
 url="https://gitea.planet-casio.com/Lephenixnoir/${pkgname}"
diff --git a/templates/mkg3a.j2 b/pkgtmpl/mkg3a.j2
similarity index 85%
rename from templates/mkg3a.j2
rename to pkgtmpl/mkg3a.j2
index 9322b26..89206a3 100644
--- a/templates/mkg3a.j2
+++ b/pkgtmpl/mkg3a.j2
@@ -1,6 +1,4 @@
-# Maintainer: Peter Marheine <peter@taricorp.net>
-# Contributor: {{ maintainer }}
-pkgname=mkg3a
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc="A tool to create Casio FX-CG addon (.g3a) files."
diff --git a/templates/openlibm-casio.j2 b/pkgtmpl/openlibm-casio.j2
similarity index 94%
rename from templates/openlibm-casio.j2
rename to pkgtmpl/openlibm-casio.j2
index 1179c4c..c7165e0 100644
--- a/templates/openlibm-casio.j2
+++ b/pkgtmpl/openlibm-casio.j2
@@ -1,7 +1,6 @@
-# Maintainer: {{ maintainer }}
-pkgname=openlibm-casio
+pkgname={{ name }}
 pkgver={{ tag }}
-pkgrel=2
+pkgrel=3
 pkgdesc='Fork of the OpenLibm math library with support for fx-9860G and fx-CG 50'
 arch=('i686' 'x86_64')
 url="https://gitea.planet-casio.com/Lephenixnoir/OpenLibm"
diff --git a/templates/p7.j2 b/pkgtmpl/p7.j2
similarity index 85%
rename from templates/p7.j2
rename to pkgtmpl/p7.j2
index e046788..7f96536 100644
--- a/templates/p7.j2
+++ b/pkgtmpl/p7.j2
@@ -1,6 +1,4 @@
-# Maintainer: Breizh <breizh.craft.98@openmailbox.org>
-# Contributor: {{ maintainer }}
-pkgname=p7
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc="Casio Communication Protocol 7.00 implementation"
diff --git a/templates/p7screen.j2 b/pkgtmpl/p7screen.j2
similarity index 71%
rename from templates/p7screen.j2
rename to pkgtmpl/p7screen.j2
index 5614cd1..dcef9e9 100644
--- a/templates/p7screen.j2
+++ b/pkgtmpl/p7screen.j2
@@ -1,26 +1,15 @@
-# Maintainer: Breizh <breizh.craft.98@openmailbox.org>
-# Contributor: {{ maintainer }}
-pkgname=p7screen
+pkgname={{ name }}
 pkgver={{ tag }}
 pkgrel=1
 pkgdesc="Casio Communication Protocol 7.00 implementation"
 arch=('i686' 'x86_64')
 url="https://p7.planet-casio.com/"
 license=('GPL2')
-groups=()
 depends=('libusb>=1.0' 'libp7>=3.0' 'sdl>=1.2.15')
 makedepends=('asciidoc>=8.6.9')
-optdepends=()
 provides=('p7screen')
-conflicts=()
-replaces=()
-backup=()
-options=()
-install=
-changelog=
 source=(https://p7.planet-casio.com/pub/p7utils-${pkgver}.tar.gz)
 sha256sums=('{{ hash }}')
-noextract=()
 
 build() {
   cd "p7utils-$pkgver"
diff --git a/pkgtmpl/sh-elf-binutils-casio.j2 b/pkgtmpl/sh-elf-binutils-casio.j2
new file mode 100644
index 0000000..6731202
--- /dev/null
+++ b/pkgtmpl/sh-elf-binutils-casio.j2
@@ -0,0 +1,49 @@
+pkgname={{ name }}
+pkgver={{ tag }}
+pkgrel=1
+pkgdesc="GNU binary utilities for the Casio calculators SuperH processors."
+arch=('i686' 'x86_64')
+url="https://www.gnu.org/software/binutils/"
+license=('GPL')
+depends=('binutils' 'flex' 'zlib')
+makedepends=('gcc')
+options=('!emptydirs' '!libtool')
+source=("https://ftp.gnu.org/gnu/binutils/binutils-${pkgver}.tar.xz")
+sha256sums=('{{ hash }}')
+_target="sh-elf"
+
+prepare() {
+  cd "${srcdir}/binutils-${pkgver}"
+
+  # ensure a clean build
+  [[ -d binutils-build ]] && rm -rf binutils-build
+  mkdir binutils-build
+}
+
+build() {
+  export CPPFLAGS=""
+  cd "${srcdir}/binutils-${pkgver}/binutils-build"
+  ../configure \
+    --prefix=/usr \
+    --target=sh3eb-elf \
+    --with-multilib-list=m3,m4-nofpu \
+    --program-prefix=${_target}- \
+    --disable-nls \
+    --enable-libssp \
+    --enable-lto
+
+  make configure-host
+  make
+}
+
+package() {
+  cd "${srcdir}/binutils-${pkgver}/binutils-build"
+  echo "Install on ${pkgdir}"
+  make DESTDIR="${pkgdir}" install-strip
+
+  # Remove info documents that conflicts with host version
+  rm -rf "${pkgdir}/usr/share/info"
+
+  # Remove libraries that conflict with host version
+  rm -rf "${pkgdir}/usr/lib"
+}
diff --git a/pkgtmpl/sh-elf-gcc-casio.j2 b/pkgtmpl/sh-elf-gcc-casio.j2
new file mode 100644
index 0000000..6cc5d23
--- /dev/null
+++ b/pkgtmpl/sh-elf-gcc-casio.j2
@@ -0,0 +1,49 @@
+pkgname={{ name }}
+pkgver={{ tag }}
+pkgrel=1
+pkgdesc="The GNU Compiler Collection for the Casio calculators SuperH processors."
+arch=(i686 x86_64)
+license=('GPL' 'LGPL')
+url='http://gcc.gnu.org'
+depends=("sh-elf-binutils-casio" 'libmpc' 'elfutils' 'gmp' 'mpfr')
+optdepends=('isl: integer set library')
+options=('!buildflags' '!libtool' '!emptydirs' 'zipman' 'docs' '!strip')
+source=("https://gcc.gnu.org/pub/gcc/releases/gcc-${pkgver}/gcc-${pkgver}.tar.xz")
+sha256sums=('{{ hash }}')
+_target="sh-elf"
+
+prepare() {
+  cd "${srcdir}/gcc-${pkgver}"
+
+  # Ensure a clean build
+  [[ -d gcc-build ]] && rm -rf gcc-build
+  mkdir gcc-build
+}
+
+build() {
+  cd "${srcdir}/gcc-${pkgver}/gcc-build"
+
+  ../configure \
+    --prefix=/usr \
+    --target=sh3eb-elf \
+    --with-multilib-list=m3,m4-nofpu \
+    --program-prefix=${_target}- \
+    --enable-languages=c,c++ \
+    --without-headers \
+    --with-newlib \
+    --disable-nls \
+    --enable-libssp \
+    --enable-lto \
+    --disable-werror
+
+  make all-gcc all-target-libgcc
+}
+
+package() {
+  cd "${srcdir}/gcc-${pkgver}/gcc-build"
+
+  make DESTDIR="${pkgdir}" install-strip-gcc install-strip-target-libgcc
+
+  # Remove unwanted files
+  rm -rf "${pkgdir}/usr/share/"
+}
diff --git a/scripts/build.sh b/scripts/build.sh
deleted file mode 100644
index 4ec6053..0000000
--- a/scripts/build.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-cd $1
-makepkg -si --noconfirm
diff --git a/templates/maintainers.j2 b/templates/maintainers.j2
new file mode 100644
index 0000000..57270c6
--- /dev/null
+++ b/templates/maintainers.j2
@@ -0,0 +1,2 @@
+{% for maintainer in maintainers %}# Maintainer: {{ maintainer }}{% endfor %}
+{% for contributor in contributors %}# Contributor: {{ contributor }}{% endfor %}