diff --git a/README.md b/README.md
index 83cdb056d36c9b69b03619869eede65afb01bc58..71d81af6748a1df69883ec432814de1e7a3feb59 100644
--- a/README.md
+++ b/README.md
@@ -143,9 +143,3 @@ If the assignments repo has changed, either due to assignments being changed or
 This is due to windows placing return characters in the strings that get
 passed to the scripts. Please use git bash or a terminal that does UNIX
 string passing.
-
-**Cannot figure out the host**
-This occurs within newer level Macs that use Apple Silicon, docker
-currently requires x86 architectures to work, you'll need to use the
-student environment.
-
diff --git a/os161-container/Dockerfile b/os161-container/Dockerfile
index 67bb4b0a0c7fe4b236e24155f572a46c8caafeb2..4945e7229159f5efb2014b7525046cad25c66b73 100644
--- a/os161-container/Dockerfile
+++ b/os161-container/Dockerfile
@@ -10,12 +10,16 @@ RUN mkdir -p /os161/tools/bin; \
     mkdir -p /os161/tools/share/man/man1; \
     mkdir -p /os161/tools/share/mk;
 
+# Install a newer version of config.guess with ARM support. Pin it to a specific commit for stability.
+ADD https://git.savannah.gnu.org/cgit/config.git/plain/config.guess?id=20403c5701973a4cbd7e0b4bbeb627fcd424a0f1 /tmp/config.guess
+RUN chmod +x /tmp/config.guess
 
 COPY dependencies/os161-binutils.tar.gz /binutils.tar.gz
 RUN mkdir /binutils-src; \
     tar -xf /binutils.tar.gz -C /binutils-src --strip-components 1
 WORKDIR /binutils-src
 
+RUN cp -f /tmp/config.guess .
 RUN find . -name '*.info' | xargs touch; \
     ./configure --nfp --disable-werror --target=mips-harvard-os161 --prefix=/os161/tools; \
     make -j 4 && make install; \
@@ -30,6 +34,7 @@ RUN mkdir /gcc-src; \
     tar -xf /gcc.tar.gz -C /gcc-src --strip-components 1
 WORKDIR /gcc-src
 
+RUN cp -f /tmp/config.guess .
 RUN CFLAGS="-std=gnu89" ./configure -nfp --disable-shared --disable-threads \
 	--disable-libmudflap --disable-libssp --target=mips-harvard-os161 --prefix=/os161/tools; \
     make -j 4 && make install; \
@@ -65,12 +70,14 @@ COPY dependencies/os161-gdb.tar.gz /os161-gdb.tar.gz
 RUN mkdir /os161-gdb/ && tar -xf /os161-gdb.tar.gz -C /os161-gdb --strip-components 1
 
 WORKDIR /os161-gdb
+RUN cp -f /tmp/config.guess .
 RUN CFLAGS="-std=gnu89" ./configure --target=mips-harvard-os161 --prefix=/os161/tools --disable-werror && \
     make && make install
 
 WORKDIR /
 RUN rm -rf /os161-gdb /os161-gdb.tar.gz
 
+RUN rm -f /tmp/config.guess
 RUN cd /os161/tools/bin && sh -c 'for i in mips-*; do ln -s /os161/tools/bin/$i /os161/tools/bin/cs350-`echo $i | cut -d- -f4-`; done'
 
 RUN python3 -m pip install -U prettytable