diff --git a/BioArchLinux/r-dfoptim/lilac.py b/BioArchLinux/r-dfoptim/lilac.py
index 88d6ed8749..55d9e3b885 100644
--- a/BioArchLinux/r-dfoptim/lilac.py
+++ b/BioArchLinux/r-dfoptim/lilac.py
@@ -1,13 +1,17 @@
 #!/usr/bin/env python3
 from lilaclib import *
 
+import os
+import sys
+
+sys.path.append(os.path.normpath(f"{__file__}/../../../lilac-extensions"))
+from lilac_r_utils import r_pre_build
+
+
 def pre_build():
-    for line in edit_file('PKGBUILD'):
-        if line.startswith('_pkgver='):
-            line = f'_pkgver={_G.newver}'
-        print(line)
-    update_pkgver_and_pkgrel(_G.newver.replace(':', '.').replace('-', '.'))
+    r_pre_build(_G)
+
 
 def post_build():
     git_pkgbuild_commit()
-    update_aur_repo()
\ No newline at end of file
+    update_aur_repo()
diff --git a/BioArchLinux/r-dfoptim/lilac.yaml b/BioArchLinux/r-dfoptim/lilac.yaml
index 4882dfee46..47bdd23a37 100644
--- a/BioArchLinux/r-dfoptim/lilac.yaml
+++ b/BioArchLinux/r-dfoptim/lilac.yaml
@@ -3,7 +3,8 @@ maintainers:
 - github: sukanka
   email: sukanka@askk.cc
 update_on:
-- regex: dfoptim_([\d._-]+).tar.gz
-  source: regex
-  url: https://bioconductor.org/packages/dfoptim
+- source: rpkgs
+  pkgname: knitr
+  repo: cran
+  md5: true
 - alias: r