Index: .github/workflows/ubuntu-18.04-32bit.yml
==================================================================
--- .github/workflows/ubuntu-18.04-32bit.yml
+++ .github/workflows/ubuntu-18.04-32bit.yml
@@ -19,11 +19,13 @@
           - --without-tls --disable-shared
           - --without-tls --disable-shared --enable-seluid24
           - --without-tls --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
     - 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 +19,13 @@
           - --without-tls --disable-shared
           - --without-tls --disable-shared --enable-seluid24
           - --without-tls --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib gobjc
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib gobjc
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="gcc -m32" ${{ matrix.configure_flags }}

Index: .github/workflows/ubuntu-18.04-gcc.yml
==================================================================
--- .github/workflows/ubuntu-18.04-gcc.yml
+++ .github/workflows/ubuntu-18.04-gcc.yml
@@ -21,11 +21,13 @@
           - --disable-compiler-tls --disable-threads
           - --with-tls=gnutls
           - --with-tls=gnutls --disable-shared
     steps:
     - name: Install dependencies
-      run: sudo apt install gobjc libssl-dev gnutls-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install gobjc libssl-dev gnutls-dev
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="gcc" ${{ matrix.configure_flags }}

Index: .github/workflows/ubuntu-18.04.yml
==================================================================
--- .github/workflows/ubuntu-18.04.yml
+++ .github/workflows/ubuntu-18.04.yml
@@ -21,11 +21,13 @@
           - --disable-compiler-tls --disable-threads
           - --with-tls=gnutls
           - --with-tls=gnutls --disable-shared
     steps:
     - name: Install dependencies
-      run: sudo apt install libssl-dev gnutls-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install libssl-dev gnutls-dev
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure ${{ 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 +19,13 @@
           - --without-tls --disable-shared
           - --without-tls --disable-shared --enable-seluid24
           - --without-tls --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
     - 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 +19,13 @@
           - --without-tls --disable-shared
           - --without-tls --disable-shared --enable-seluid24
           - --without-tls --disable-compiler-tls --disable-threads
     steps:
     - name: Install dependencies
-      run: sudo apt install gcc-multilib gobjc
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib gobjc
     - 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-gcc.yml
==================================================================
--- .github/workflows/ubuntu-20.04-gcc.yml
+++ .github/workflows/ubuntu-20.04-gcc.yml
@@ -21,11 +21,13 @@
           - --disable-compiler-tls --disable-threads
           - --with-tls=gnutls
           - --with-tls=gnutls --disable-shared
     steps:
     - name: Install dependencies
-      run: sudo apt install gobjc libssl-dev gnutls-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install gobjc libssl-dev gnutls-dev
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure OBJC="gcc" ${{ matrix.configure_flags }}

Index: .github/workflows/ubuntu-20.04.yml
==================================================================
--- .github/workflows/ubuntu-20.04.yml
+++ .github/workflows/ubuntu-20.04.yml
@@ -21,11 +21,13 @@
           - --disable-compiler-tls --disable-threads
           - --with-tls=gnutls
           - --with-tls=gnutls --disable-shared
     steps:
     - name: Install dependencies
-      run: sudo apt install libssl-dev gnutls-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install libssl-dev gnutls-dev
     - uses: actions/checkout@v2
     - name: autogen.sh
       run: ./autogen.sh
     - name: configure
       run: ./configure ${{ matrix.configure_flags }}