diff --git a/arch/distcc-avahi/PKGBUILD b/arch/distcc-avahi/PKGBUILD
index 6c027565d..c1fc42bcb 100644
--- a/arch/distcc-avahi/PKGBUILD
+++ b/arch/distcc-avahi/PKGBUILD
@@ -42,6 +42,10 @@ prepare() {
 
 build() {
     cd "${_pkgname}-${pkgver}"
+    # distcc 3.4 has a const-qualifier discard that gcc 15+ flags as error
+    # under its own -Werror. Downgrade to a warning.
+    export CFLAGS="${CFLAGS} -Wno-error"
+    export CXXFLAGS="${CXXFLAGS} -Wno-error"
     ./configure \
         --prefix=/usr \
         --sysconfdir=/etc \