diff --git a/development/simavr/simavr.SlackBuild b/development/simavr/simavr.SlackBuild
index 508a322e23..a8b989b385 100644
--- a/development/simavr/simavr.SlackBuild
+++ b/development/simavr/simavr.SlackBuild
@@ -23,7 +23,7 @@
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 PRGNAM=simavr
-VERSION=${VERSION:-git20170615}
+VERSION=${VERSION:-git20170904}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
@@ -41,16 +41,16 @@ PKG=$TMP/package-$PRGNAM
 OUTPUT=${OUTPUT:-/tmp}
 
 if [ "$ARCH" = "i586" ]; then
-  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  SLKCFLAGS="-g -O0 -march=i586 -mtune=i686"
   LIBDIRSUFFIX=""
 elif [ "$ARCH" = "i686" ]; then
-  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  SLKCFLAGS="-g -O0 -march=i686 -mtune=i686"
   LIBDIRSUFFIX=""
 elif [ "$ARCH" = "x86_64" ]; then
-  SLKCFLAGS="-O2 -fPIC"
+  SLKCFLAGS="-g -O0 -fPIC"
   LIBDIRSUFFIX="64"
 else
-  SLKCFLAGS="-O2"
+  SLKCFLAGS="-g -O0"
   LIBDIRSUFFIX=""
 fi
 
@@ -71,9 +71,11 @@ find -L . \
 
 sed -i -e "s#\$(DESTDIR)/lib#\$(DESTDIR)/lib${LIBDIRSUFFIX}#" simavr/Makefile
 sed -i -e "s#libdir=${exec_prefix}/lib#libdir=${exec_prefix}/lib${LIBDIRSUFFIX}#" \
-  simavr/simavr.pc simavr/simavr-avr.pc
+  simavr/simavr.pc simavr/simavr-avr.pc simavr/simavrparts.pc
 
-make AVR_ROOT=/usr/avr RELEASE=1 build-simavr
+make clean
+make AVR_ROOT=/usr/avr \
+  CFLAGS="-Wall -Wextra $SLKCFLAGS -std=gnu99 -Wno-sign-compare -Wno-unused-parameter"
 make PREFIX="/usr" DESTDIR="$PKG/usr" install
 
 find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
diff --git a/development/simavr/simavr.info b/development/simavr/simavr.info
index c2ed3fe06d..9c5013eaf5 100644
--- a/development/simavr/simavr.info
+++ b/development/simavr/simavr.info
@@ -1,8 +1,8 @@
 PRGNAM="simavr"
-VERSION="git20170615"
+VERSION="git20170904"
 HOMEPAGE="https://github.com/buserror/simavr"
-DOWNLOAD="https://www.dropbox.com/s/i4jymt5o0hi3e5y/simavr-git20170615.tar.gz"
-MD5SUM="651329385f68baedb0f74a363fa1d87d"
+DOWNLOAD="https://www.dropbox.com/s/wizo8j0fmcq14mr/simavr-git20170904.tar.gz?dl=0"
+MD5SUM="93f10b449440603adc3bcea298059ae3"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES="avr-gcc avr-libc"