commit b02e46e80eedea8f7587afd923c87976be5817e2
Author: orbea <orbea@riseup.net>
Date:   Thu Mar 18 14:01:21 2021 -0700

    build: Fix build with CONFIG_SHELL=/bin/dash.

diff --git a/configure.ac b/configure.ac
index 6c34ad0..f0e9393 100644
--- a/configure.ac
+++ b/configure.ac
@@ -66,7 +66,7 @@ AS_IF([test "x$with_gtk" = x3],
 AM_CONDITIONAL(USE_GTK3, [test "x$with_gtk" = x3])
 
 LT_LIB_M
-LIBINDICATOR_LIBS+="$LIBM"
+LIBINDICATOR_LIBS="${LIBINDICATOR_LIBS} $LIBM"
 
 ##############################
 # Custom Junk