diff -pruN 4+c2/debian/changelog 4+c2ubuntu6/debian/changelog
--- 4+c2/debian/changelog	2020-03-26 12:47:14.000000000 +0000
+++ 4+c2ubuntu6/debian/changelog	2021-06-02 12:54:07.000000000 +0000
@@ -1,3 +1,27 @@
+gcc-9-cross-mipsen (4+c2ubuntu6) impish; urgency=medium
+
+  * Build using gcc-9 9.4.0-1ubuntu1.
+
+ -- Matthias Klose <doko@ubuntu.com>  Wed, 02 Jun 2021 14:54:07 +0200
+
+gcc-9-cross-mipsen (4+c2ubuntu5) hirsute; urgency=medium
+
+  * Build using gcc-9 9.3.0-19.
+
+ -- Matthias Klose <doko@ubuntu.com>  Thu, 26 Nov 2020 16:08:41 +0100
+
+gcc-9-cross-mipsen (4+c2ubuntu4) groovy; urgency=medium
+
+  * Build using gcc-9 9.3.0-18.
+
+ -- Matthias Klose <doko@ubuntu.com>  Tue, 22 Sep 2020 11:41:12 +0200
+
+gcc-9-cross-mipsen (4+c2ubuntu2) focal; urgency=medium
+
+  * Build using gcc-9 9.3.0-10.
+
+ -- Matthias Klose <doko@ubuntu.com>  Sun, 05 Apr 2020 09:49:45 +0200
+
 gcc-9-cross-mipsen (4+c2) unstable; urgency=medium
 
   * Fix packages.invalid.
diff -pruN 4+c2/debian/control 4+c2ubuntu6/debian/control
--- 4+c2/debian/control	2020-03-26 12:43:36.000000000 +0000
+++ 4+c2ubuntu6/debian/control	2021-06-02 12:54:07.000000000 +0000
@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
 Uploaders: Matthias Klose <doko@debian.org>, YunQiang Su <syq@debian.org>
 Standards-Version: 4.5.0
-Build-Depends: gcc-9-source (>= 9.2.1-28~), binutils-multiarch (>= 2.30-11),
+Build-Depends: gcc-9-source (>= 9.4.0-1~), binutils-multiarch (>= 2.30-11),
   autoconf2.64, autogen, bison (>= 1:2.3),
   chrpath, debhelper (>= 9), dpkg-dev (>= 1.14.15), flex, gawk, gettext,
   gperf (>= 3.0.1), lib64gcc1-mips-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], libn32gcc1-mips-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], lib64gcc1-mipsel-cross [amd64 i386 x32 mips64el mips64r6el arm64 ppc64el], libn32gcc1-mipsel-cross [amd64 i386 x32 mips64el mips64r6el arm64 ppc64el], lib32gcc1-mips64-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], libn32gcc1-mips64-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], lib32gcc1-mips64el-cross [amd64 i386 x32 mipsel mips64r6el arm64 ppc64el], libn32gcc1-mips64el-cross [amd64 i386 x32 mipsel mips64r6el arm64 ppc64el], lib64gcc1-mipsr6-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], libn32gcc1-mipsr6-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], lib64gcc1-mipsr6el-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], libn32gcc1-mipsr6el-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], lib32gcc1-mips64r6-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], libn32gcc1-mips64r6-cross [amd64 i386 x32 mipsel mips64el mips64r6el arm64 ppc64el], lib32gcc1-mips64r6el-cross [amd64 i386 x32 mipsel mips64el arm64 ppc64el], libn32gcc1-mips64r6el-cross [amd64 i386 x32 mipsel mips64el arm64 ppc64el],
diff -pruN 4+c2/debian/rules 4+c2ubuntu6/debian/rules
--- 4+c2/debian/rules	2020-03-26 11:18:34.000000000 +0000
+++ 4+c2ubuntu6/debian/rules	2021-06-02 12:54:07.000000000 +0000
@@ -1,10 +1,7 @@
 #!/usr/bin/make -f
 
 , := ,
-space :=
-space +=
-$(space) := 
-$(space) +=
+space := $(EMPTY) $(EMPTY)
 
 NJOBS =
 # Support parallel=<n> in DEB_BUILD_OPTIONS (see #209008)
@@ -47,8 +44,8 @@ ifeq ($(GCC_VER),8)
 endif
 
 ifeq ($(GCC_VER),9)
-  MIN_VER_GCC      := 9.2.1-28~
-  PPA_VER_GCC      := 9.2.1-28~
+  MIN_VER_GCC      := 9.4.0-1~
+  PPA_VER_GCC      := 9.4.0-1~
 endif
 
 ifndef MIN_VER_GCC