diff --git a/docs/bin/py-depgraph b/docs/bin/py-depgraph
index b6c96e2..415ac0e 100755
--- a/docs/bin/py-depgraph
+++ b/docs/bin/py-depgraph
@@ -1,65 +1,65 @@
 #!/bin/bash
 
 # generate dependency graph (in DOT(1) format) for all known python modules
 #
 # include by default both internal and external dependencies, but can asked to
 # include either or none of them (see --help)
 
-if [ ! -d swh-core -o ! -f pythonpath.sh ] ; then
+if [ ! -d swh-core -o ! -f .mrconfig ] ; then
     echo "Error: you do not appear to be located in swh-environment dir,"
     echo "but this script should be run from there. Abort."
     exit 2
 fi
 
 internal_modules=1
 external_modules=1
 while [ -n "$1" ] ; do
     if [ "$1" = "--no-internal" ] ; then
         internal_modules=0
     elif [ "$1" = "--no-external" ] ; then
         external_modules=0
     elif [ "$1" = "--help" -o "$1" = "-h" ] ; then
         echo "Usage: bin/py-depgraph [--no-internal] [--no-external] > FILE.dot"
         exit 1
     fi
     shift 1
 done
 
 pyrepos=$(bin/ls-py-modules)  # available python repositories (with '-')
 
 declare -A pymods  # available python modules (with '.')
 for repo in $pyrepos ; do
     pymod=${repo//-/.}
     pymods[$pymod]=1
 done
 
 echo "digraph swh_py_deps {"
 
 for pymod in ${!pymods[@]} ; do
     echo -e "\t\"$pymod\" ;"
 done
 
 getdeps() {
     grep -E -v '(^#|^[[:space:]]*$)' "$1" | cut -f 1 -d '[' | cut -f 1 -d ' ' | tr 'A-Z' 'a-z'
 }
 
 for repo in $pyrepos ; do
     pymod=${repo//-/.}
     reqs_int="${repo}/requirements-swh.txt"
     reqs_ext="${repo}/requirements.txt"
 
     if [ "$internal_modules" -eq 1 -a -f "$reqs_int" ]; then
         for dep in $( getdeps "$reqs_int" ) ; do
             echo -e "\t\"${pymod}\" -> \"${dep}\" ;"
         done
     fi
 
     if [ "$external_modules" -eq 1 -a -f "$reqs_ext" ]; then
         for dep in $( getdeps "$reqs_ext" ) ; do
             echo -e "\t\"${dep}\" [style=dashed] ;"
             echo -e "\t\"${pymod}\" -> \"${dep}\" ;"
         done
     fi
 done | sort -u
 
 echo "}"