diff --git a/hg-fast-export.sh b/hg-fast-export.sh
index 190b783..f3f58f6 100755
--- a/hg-fast-export.sh
+++ b/hg-fast-export.sh
@@ -48,8 +48,10 @@ case "$1" in
       echo "$LONG_USAGE"
       exit 0
 esac
-. "$(git --exec-path)/git-sh-setup"
-cd_to_toplevel
+
+cd $(git rev-parse --show-toplevel) \
+    || (echo "Could not find git repo" ; exit 1)
+GIT_DIR=$(git rev-parse --git-dir) || exit 1
 
 while case "$#" in 0) break ;; esac
 do
diff --git a/hg-reset.sh b/hg-reset.sh
index 7fbacdf..d7fbff7 100755
--- a/hg-reset.sh
+++ b/hg-reset.sh
@@ -24,8 +24,9 @@ Options:
 	-r	Mercurial repository to use
 "
 
-. "$(git --exec-path)/git-sh-setup"
-cd_to_toplevel
+cd $(git rev-parse --show-toplevel) \
+    || (echo "Could not find git repo" ; exit 1)
+GIT_DIR=$(git rev-parse --git-dir) || exit 1
 
 while case "$#" in 0) break ;; esac
 do