diff --git a/libexec/pyenv-prefix b/libexec/pyenv-prefix
index 882390e1..64f6f391 100755
--- a/libexec/pyenv-prefix
+++ b/libexec/pyenv-prefix
@@ -31,8 +31,7 @@ PYENV_PREFIX_PATHS=()
 for version in "${versions[@]}"; do
   if [ "$version" = "system" ]; then
     PYTHON_PATH="$(PYENV_VERSION="${version}" pyenv-which python || true)"
-    PYENV_PREFIX_PATH="${PYTHON_PATH%/*}"
-    PYENV_PREFIX_PATH="${PYENV_PREFIX_PATH%/bin}"
+    PYENV_PREFIX_PATH="${PYTHON_PATH%/bin/*}"
   else
     PYENV_PREFIX_PATH="${PYENV_ROOT}/versions/${version}"
   fi