Index: .github/workflows/ubuntu-18.04-32bit.yml
==================================================================
--- .github/workflows/ubuntu-18.04-32bit.yml
+++ .github/workflows/ubuntu-18.04-32bit.yml
@@ -19,11 +19,11 @@
           - --disable-shared
           - --disable-shared --enable-seluid24
           - --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib gnutls-dev
+      run: sudo apt install gcc-multilib gnutls-dev libgnutls-dev:i386
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="clang -m32" ${{ matrix.configure_flags }}

Index: .github/workflows/ubuntu-18.04-gcc-32bit.yml
==================================================================
--- .github/workflows/ubuntu-18.04-gcc-32bit.yml
+++ .github/workflows/ubuntu-18.04-gcc-32bit.yml
@@ -19,11 +19,11 @@
           - --disable-shared
           - --disable-shared --enable-seluid24
           - --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib gobjc gnutls-dev
+      run: sudo apt install gcc-multilib gobjc gnutls-dev libgnutls-dev:i386
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="gcc -m32" ${{ matrix.configure_flags }}

Index: .github/workflows/ubuntu-20.04-32bit.yml
==================================================================
--- .github/workflows/ubuntu-20.04-32bit.yml
+++ .github/workflows/ubuntu-20.04-32bit.yml
@@ -19,11 +19,11 @@
           - --disable-shared
           - --disable-shared --enable-seluid24
           - --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib gnutls-dev
+      run: sudo apt install gcc-multilib gnutls-dev libgnutls-dev:i386
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="clang -m32" ${{ matrix.configure_flags }}

Index: .github/workflows/ubuntu-20.04-gcc-32bit.yml
==================================================================
--- .github/workflows/ubuntu-20.04-gcc-32bit.yml
+++ .github/workflows/ubuntu-20.04-gcc-32bit.yml
@@ -19,11 +19,11 @@
           - --disable-shared
           - --disable-shared --enable-seluid24
           - --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib gobjc gnutls-dev
+      run: sudo apt install gcc-multilib gobjc gnutls-dev libgnutls-dev:i386
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="gcc -m32" ${{ matrix.configure_flags }}