diff --git a/build-aux/git-hooks/post-commit b/build-aux/git-hooks/post-commit
index 05f2d778b5c..10f43b539ac 100755
--- a/build-aux/git-hooks/post-commit
+++ b/build-aux/git-hooks/post-commit
@@ -34,6 +34,8 @@
 
 ### Code:
 
+HOOKS_DIR=$(dirname $0)
+
 # Prefer gawk if available, as it handles NUL bytes properly.
 if type gawk >/dev/null 2>&1; then
   awk="gawk"
@@ -42,4 +44,4 @@ else
 fi
 
 git rev-parse HEAD | $awk -v reason=post-commit \
-                          -f ${GIT_DIR:-.git}/hooks/commit-msg-files.awk
+                          -f $HOOKS_DIR/commit-msg-files.awk
diff --git a/build-aux/git-hooks/pre-push b/build-aux/git-hooks/pre-push
index 6ff59102fd7..8d5dde2bbaf 100755
--- a/build-aux/git-hooks/pre-push
+++ b/build-aux/git-hooks/pre-push
@@ -31,6 +31,8 @@
 
 ### Code:
 
+HOOKS_DIR=$(dirname $0)
+
 # Prefer gawk if available, as it handles NUL bytes properly.
 if type gawk >/dev/null 2>&1; then
   awk="gawk"
@@ -83,4 +85,4 @@ $awk -v origin_name="$1" '
     # Print every SHA after oldref, up to (and including) newref.
     system("git rev-list --first-parent --reverse " oldref ".." newref)
   }
-' | $awk -v reason=pre-push -f ${GIT_DIR:-.git}/hooks/commit-msg-files.awk
+' | $awk -v reason=pre-push -f $HOOKS_DIR/commit-msg-files.awk