diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index cba3eb88..41855878 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -61,6 +61,8 @@ jobs:
           - {os: ubuntu-24.04, shell: bash, bin: tform}
           # To maximize compatibility, we build executables on the oldest
           # platforms available.
+          - {os: ubuntu-24.04-arm, shell: bash, bin: form}
+          - {os: ubuntu-24.04-arm, shell: bash, bin: tform}
           - {os: macos-13, shell: bash, bin: form}
           - {os: macos-13, shell: bash, bin: tform}
           # The macos-14 runner image is based on the arm64 architecture.
@@ -79,7 +81,9 @@ jobs:
         uses: awalsh128/cache-apt-pkgs-action@v1
         with:
           packages: libmpfr-dev libzstd-dev
-          version: 1.0
+          # We need to handle a bug that may cause cache key conflicts.
+          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
+          version: ${{ runner.arch }}-1.0
 
       - name: Install dependencies (Windows)
         if: runner.os == 'Windows'
@@ -371,13 +375,19 @@ jobs:
               rm -rf $pkgname
             fi
           }
-          make_tar_gz x86_64-linux '*-ubuntu-*/*form'
+          make_tar_gz x86_64-linux '*-ubuntu-24.04/*form'
+          make_tar_gz arm64-linux '*-ubuntu-24.04-arm/*form'
           make_tar_gz x86_64-osx '*-macos-13/*form'
           make_tar_gz arm64-osx '*-macos-14/*form'
-          make_zip x86_64-windows '*-windows-*/*form.exe'
+          make_zip x86_64-windows '*-windows-2019/*form.exe'
 
-      - name: Print distributions
-        run: ls -l dist
+      - name: Summarize files for distribution
+        run: |
+          echo "Number of files: $(ls -1 dist | wc -l)" >> $GITHUB_STEP_SUMMARY
+          echo '' >> $GITHUB_STEP_SUMMARY
+          echo '| File Name | Size (bytes) |' >> $GITHUB_STEP_SUMMARY
+          echo '| --- | ---: |' >> $GITHUB_STEP_SUMMARY
+          ls -l dist | tail -n +2 | awk '{ printf "| %s | %s |\n", $9, $5 }' >> $GITHUB_STEP_SUMMARY
 
       # Upload the distributions as an artifact, regardless of whether
       # the commit has a versioning tag. This makes checking and debugging easy.
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6bccd3d2..a3af5517 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -39,7 +39,9 @@ jobs:
         uses: awalsh128/cache-apt-pkgs-action@v1
         with:
           packages: libmpfr-dev libzstd-dev
-          version: 1.0
+          # We need to handle a bug that may cause cache key conflicts.
+          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
+          version: ${{ runner.arch }}-1.0
 
       - name: Install MPI if necessary
         if: matrix.bin == 'parform' || matrix.bin == 'parvorm'
@@ -136,7 +138,9 @@ jobs:
         uses: awalsh128/cache-apt-pkgs-action@v1
         with:
           packages: libmpfr-dev libzstd-dev valgrind
-          version: 1.0
+          # We need to handle a bug that may cause cache key conflicts.
+          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
+          version: ${{ runner.arch }}-1.0
 
       - name: Configure
         run: |
@@ -180,7 +184,9 @@ jobs:
         uses: awalsh128/cache-apt-pkgs-action@v1
         with:
           packages: lcov libmpfr-dev libzstd-dev
-          version: 1.0
+          # We need to handle a bug that may cause cache key conflicts.
+          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
+          version: ${{ runner.arch }}-1.0
 
       - name: Configure
         run: |
diff --git a/sources/reken.c b/sources/reken.c
index fe9d9490..1afa6f17 100644
--- a/sources/reken.c
+++ b/sources/reken.c
@@ -3729,7 +3729,7 @@ WORD Moebius(PHEAD WORD nn)
 {
 	WORD i,n = nn, x;
 	LONG newsize;
-	char *newtable, mu;
+	SBYTE *newtable, mu;
 #if ( BITSINWORD == 32 )
 	if ( AR.notfirstprime == 0 ) StartPrimeList(BHEAD0);
 #endif
@@ -3742,7 +3742,7 @@ WORD Moebius(PHEAD WORD nn)
 		if ( AR.moebiustablesize <= 0 ) { newsize = (LONG)nn + 20; }
 		else { newsize = (LONG)nn*2; }
 		if ( newsize > MAXPOSITIVE ) newsize = MAXPOSITIVE;
-		newtable = (char *)Malloc1(newsize*sizeof(char),"Moebius");
+		newtable = (SBYTE *)Malloc1(newsize*sizeof(SBYTE),"Moebius");
 		for ( i = 0; i < AR.moebiustablesize; i++ ) newtable[i] = AR.moebiustable[i];
 		for ( ; i < newsize; i++ ) newtable[i] = 2;
 		if ( AR.moebiustablesize > 0 ) M_free(AR.moebiustable,"Moebius");
diff --git a/sources/structs.h b/sources/structs.h
index 90808f58..98adafb0 100644
--- a/sources/structs.h
+++ b/sources/structs.h
@@ -2037,7 +2037,7 @@ struct R_const {
     WORD    *CompressPointer;      /* (R) */
     COMPAREDUMMY CompareRoutine;
     ULONG   *wranfia;
-    char    *moebiustable;
+    SBYTE   *moebiustable;
 
     LONG    OldTime;               /* (R) Zero time. Needed in timer. */
     LONG    InInBuf;               /* (R) Characters in input buffer. Scratch files. */