diff --git a/development/mrustc/mrustc.SlackBuild b/development/mrustc/mrustc.SlackBuild
index ee47d592554..0d136f39004 100644
--- a/development/mrustc/mrustc.SlackBuild
+++ b/development/mrustc/mrustc.SlackBuild
@@ -26,10 +26,11 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=mrustc
-VERSION=${VERSION:-0.11.2}
+VERSION=${VERSION:-0.12.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
+RUSTVER=${RUSTVER:-1.90.0}
 
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
@@ -70,7 +71,7 @@ cd $TMP
 rm -rf $PRGNAM-$VERSION
 tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
 cd $PRGNAM-$VERSION
-cp -a $CWD/rustc-1.29.0-src.tar.gz .
+cp -a $CWD/rustc-$RUSTVER-src.tar.gz .
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
@@ -80,13 +81,15 @@ find -L . \
 
 export CFLAGS="$SLKCFLAGS"
 export CXXFLAGS="$SLKCFLAGS"
+export RUSTC_VERSION=$RUSTVER MRUSTC_TARGET_VER=${RUSTVER%.*} OUTDIR_SUF=-${RUSTVER}
+
 make
 make LIBS
 make test
 
 install -Dm755 bin/{mrustc,minicargo} \
 	-t $PKG/usr/bin
-install -Dm644 output/*rlib{,.o,.hir} \
+install -Dm644 output-$RUSTVER/*rlib{,.o,.hir} \
 	-t $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM
 install -Dm644 rustc-*.{patch,toml} \
 	-t $PKG/usr/share/$PRGNAM
diff --git a/development/mrustc/mrustc.info b/development/mrustc/mrustc.info
index 6b9b8ea5801..b9aacad4711 100644
--- a/development/mrustc/mrustc.info
+++ b/development/mrustc/mrustc.info
@@ -1,12 +1,12 @@
 PRGNAM="mrustc"
-VERSION="0.11.2"
+VERSION="0.12.0"
 HOMEPAGE="https://github.com/thepowersgang/mrustc"
 DOWNLOAD="UNSUPPORTED"
 MD5SUM=""
-DOWNLOAD_x86_64="https://github.com/thepowersgang/mrustc/archive/v0.11.2/mrustc-0.11.2.tar.gz \
-                 https://static.rust-lang.org/dist/rustc-1.29.0-src.tar.gz"
-MD5SUM_x86_64="bc85a8cbc0c82c6c1128c42c7fd55c59 \
-               54c3f0ffb826bdcc2a7395468828a94c"
+DOWNLOAD_x86_64="https://github.com/thepowersgang/mrustc/archive/v0.12.0/mrustc-0.12.0.tar.gz \
+                 https://static.rust-lang.org/dist/rustc-1.90.0-src.tar.gz"
+MD5SUM_x86_64="ca451ec73c133e8c64636535aa69d96b \
+               23957d9c3a1c82467d9793e404bf9d04"
 REQUIRES=""
 MAINTAINER="Ruoh-Shoei LIN"
 EMAIL="lin.ruohshoei+sbo@gmail.com"