--- texmf.d/10standardpaths.cnf
+++ texmf.d/10standardpaths.cnf
@@ -221,7 +221,7 @@
 PDFTEXCONFIG = .;$TEXMF/pdftex/{$progname,}//
 
 % Used by DMP (ditroff-to-mpx), called by makempx -troff.
-TRFONTS = /usr{/local,}/share/groff/{current/font,site-font}/devps
+TRFONTS = $SELFAUTOPARENT/usr{/local,}/share/groff/{current/font,site-font}/devps
 MPSUPPORT = .;$TEXMF/metapost/support
 
 % For xdvi to find mime.types and .mailcap, if they do not exist in
--- texmf/web2c/texmf.cnf
+++ texmf/web2c/texmf.cnf
@@ -368,7 +368,7 @@
 PDFTEXCONFIG = .;$TEXMF/pdftex/{$progname,}//
 
 % Used by DMP (ditroff-to-mpx), called by makempx -troff.
-TRFONTS = /usr{/local,}/share/groff/{current/font,site-font}/devps
+TRFONTS = $SELFAUTOPARENT/usr{/local,}/share/groff/{current/font,site-font}/devps
 MPSUPPORT = .;$TEXMF/metapost/support
 
 % For xdvi to find mime.types and .mailcap, if they do not exist in