diff --git a/configs/hledger.nix b/configs/hledger.nix
index 92c4644..d86b5c0 100644
--- a/configs/hledger.nix
+++ b/configs/hledger.nix
@@ -1,33 +1,15 @@
 {
-  config,
   pkgs,
   ...
 }: let
-  ledgerDirectory = "$HOME/projects/ledger";
-  timeLedger = "${ledgerDirectory}/time.timeclock";
-  hora = pkgs.writers.writeDashBin "hora" ''
-    ${pkgs.hledger}/bin/hledger -f "${timeLedger}" "$@"
-  '';
+  ledgerDirectory = "/home/kfm/projects/ledger";
+  hora = pkgs.callPackage ../packages/hora.nix { timeLedger = "${ledgerDirectory}/time.timeclock"; };
 in {
   environment.systemPackages = let
     git = "${pkgs.git}/bin/git -C ${ledgerDirectory}";
   in [
-    pkgs.hledger
-    (pkgs.writers.writeDashBin "hora-edit" ''
-      $EDITOR + "${timeLedger}" && ${pkgs.git}/bin/git -C "$(${pkgs.coreutils}/bin/dirname ${timeLedger})" commit --all --message "$(${pkgs.coreutils}/bin/date -Im)"
-    '')
     hora
-    (pkgs.writers.writeDashBin "hora-year" ''
-      ${hora}/bin/hora bal --tree --monthly --begin $(date +%Y) --depth 1
-    '')
-    (pkgs.writers.writeDashBin "hora-filli" ''
-      ${pkgs.hledger}/bin/hledger -f "${timeLedger}" register fillidefilla -O csv \
-        -b "$(date -d "$(date +%Y-%m)-01 last month" +%Y-%m-%d)" \
-        -e "$(date -d "$(date +%Y-%m)-01" +%Y-%m-%d)" \
-        | sed 's/(fillidefilla:\(.*\))/\1/g' \
-        | xsv select date,amount,total,account,description
-    '')
-
+    pkgs.hledger
     (pkgs.writers.writeDashBin "hledger-git" ''
       if [ "$1" = entry ]; then
         ${pkgs.hledger}/bin/hledger balance -V > "${ledgerDirectory}/balance.txt"
diff --git a/packages/hora.nix b/packages/hora.nix
new file mode 100644
index 0000000..94e641c
--- /dev/null
+++ b/packages/hora.nix
@@ -0,0 +1,80 @@
+{ symlinkJoin
+, hledger
+, writers
+, lib
+, git
+, coreutils
+, gnugrep
+, timeLedger
+, ...
+}:
+let
+  date = "${coreutils}/bin/date +'%Y-%m-%d %H:%M:%S'";
+
+  hora = writers.writeDashBin "hora" "${hledger}/bin/hledger -f ${lib.escapeShellArg timeLedger} \"$@\"";
+  hora-edit = writers.writeDashBin "hora-edit" "$EDITOR ${lib.escapeShellArg timeLedger}";
+  hora-status = writers.writeDashBin "hora-status" "${coreutils}/bin/tac ${lib.escapeShellArg timeLedger} | ${gnugrep}/bin/grep -m 1 .";
+
+  hora-start = writers.writeDashBin "hora-start" ''
+    last_nonempty_line=$(${hora-status}/bin/hora-status)
+    (echo $last_nonempty_line | ${gnugrep}/bin/grep -q "^o") || {
+        echo "Last activity must be closed: $last_nonempty_line" >/dev/stderr
+        exit 1
+    }
+
+    account=$1
+    (${hora}/bin/hora accounts | ${gnugrep}/bin/grep -q "^$account\$") || {
+        echo "The account '$account' is not known. Please add manually."
+        exit 1
+    }
+
+    message=$2
+    date=$(${date})
+    echo "i $date $account  $message\n" >> "${timeLedger}"
+    echo "Started $account at $date" >/dev/stderr 
+  '';
+
+  hora-stop = writers.writeDashBin "hora-stop" ''
+    last_nonempty_line=$(${hora-status}/bin/hora-status)
+
+    (echo $last_nonempty_line | ${gnugrep}/bin/grep "^i") || {
+        echo "Last activity cannot be closed: $last_nonempty_line" >/dev/stderr
+        exit 1
+    }
+
+    last_activity=$(echo "$last_nonempty_line" | ${coreutils}/bin/cut -d' ' -f 4)
+    date=$(${date})
+
+    echo "o $date\n" >> ${timeLedger}
+    echo "Stopped $last_activity at $date" >/dev/stderr
+  '';
+
+  hora-year = writers.writeDashBin "hora-year" ''
+    ${hora}/bin/hora balance --tree --monthly --begin $(${coreutils}/bin/date +%Y) --depth 1
+  '';
+  hora-git = writers.writeDashBin "hora-git" ''
+    directory=$(${coreutils}/bin/dirname ${lib.escapeShellArg timeLedger})
+    if [ $# -gt 0 ]
+    then
+      ${git}/bin/git -C "$directory" --all --message=$(${date})
+    else
+      ${git}/bin/git -C "$directory" "$@"
+    fi
+  '';
+  hora-weekly = writers.writeDashBin "hora-weekly" ''
+    ${hora}/bin/hora register -p weekly --depth 1 --empty
+  '';
+in
+symlinkJoin {
+  name = "hora";
+  paths = [
+    hora
+    hora-edit
+    hora-start
+    hora-status
+    hora-stop
+    hora-year
+    hora-git
+    hora-weekly
+  ];
+}
diff --git a/systems/maakaron/home.nix b/systems/maakaron/home.nix
index f284f53..bad73e1 100644
--- a/systems/maakaron/home.nix
+++ b/systems/maakaron/home.nix
@@ -9,7 +9,10 @@
   system = "x86_64-darwin";
 
   nextcloud = "${config.home.homeDirectory}/Nextcloud/ZODIAC";
-  timeLedger = "${nextcloud}/hora.timeclock";
+
+  hora = pkgs.callPackage ../../packages/hora.nix {
+    timeLedger = "${nextcloud}/hora.timeclock";
+  };
 
   adminEssentials = import ../../configs/admin-essentials.nix {
     inherit pkgs niveumPackages lib system;
@@ -25,53 +28,7 @@
 in {
   home.packages =
     [
-      (pkgs.writers.writeDashBin "hora" ''
-        ${pkgs.hledger}/bin/hledger -f "${timeLedger}" "$@"
-      '')
-      (pkgs.writers.writeDashBin "hora-edit" ''
-        nvim + "${timeLedger}"
-      '')
-      (pkgs.writers.writeDashBin "hora-status" ''
-        ${pkgs.coreutils}/bin/tac "${timeLedger}" | ${pkgs.gnugrep}/bin/grep -m 1 . 
-      '')
-      (pkgs.writers.writeDashBin "hora-start" ''
-        [ -w "${timeLedger}" ] || {
-            echo "${timeLedger}" is not a writable file >/dev/stderr
-            exit 1
-        }
-        last_nonempty_line=$(hora-status)
-        (echo $last_nonempty_line | ${pkgs.gnugrep}/bin/grep -q "^o") || {
-            echo "Last activity must be closed: $last_nonempty_line" >/dev/stderr
-            exit 1
-        }
-        account=$1
-        (hora accounts | ${pkgs.gnugrep}/bin/grep -q "^$account\$") || {
-            echo "The account '$account' is not known. Please add manually."
-            exit 1
-        }
-
-        message=$2
-        date=$(${pkgs.coreutils}/bin/date +"%Y-%m-%d %H:%M:%S")
-        echo "i $date $account  $message\n" >> "${timeLedger}"
-        echo Started $account at $date >/dev/stderr 
-      '')
-      (pkgs.writers.writeDashBin "hora-stop" ''
-        [ -w "${timeLedger}" ] || {
-            echo "${timeLedger}" is not a writable file >/dev/stderr
-            exit 1
-        }
-        last_nonempty_line=$(hora-status)
-        (echo $last_nonempty_line | ${pkgs.gnugrep}/bin/grep "^i") || {
-            echo "Last activity cannot be closed: $last_nonempty_line" >/dev/stderr
-            exit 1
-        }
-
-        last_activity=$(${pkgs.coreutils}/bin/tail -n 1 ${timeLedger} | ${pkgs.coreutils}/bin/cut -d' ' -f 4)
-        date=$(${pkgs.coreutils}/bin/date +"%Y-%m-%d %H:%M:%S")
-
-        echo "o $date\n" >> ${timeLedger}
-        echo Stopped $last_activity at $date >/dev/stderr
-      '')
+      hora
       niveumPackages.vim
       pkgs.ghc
       pkgs.python3