diff --git a/BioArchLinux/r-rglpk/lilac.py b/BioArchLinux/r-rglpk/lilac.py
index 39f2603630..e18f13e18c 100644
--- a/BioArchLinux/r-rglpk/lilac.py
+++ b/BioArchLinux/r-rglpk/lilac.py
@@ -7,7 +7,9 @@ sys.path.append(os.path.normpath(f'{__file__}/../../../lilac-extensions'))
 from lilac_r_utils import r_pre_build
 
 def pre_build():
-    r_pre_build(_G)
+    r_pre_build(_G,
+                expect_systemrequirements = "GLPK library package (e.g., libglpk-dev on Debian/Ubuntu)"
+               )
 
 def post_build():
     git_pkgbuild_commit()