CI: make sure pre-build files are newer than source code.

CI is rebuilding, which seems strange.  Try adding -m which means it
doesn't restore mtimes on files: they will look brand new to make.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Author: rustyrussell

.github/workflows/ci.yaml

@@ -206,7 +206,7 @@ jobs:
 
       - name: Check
         run: |
-          tar -xaf cln-${{ matrix.CFG }}.tar.bz2
+          tar -xmaf cln-${{ matrix.CFG }}.tar.bz2
           uv run eatmydata make -j $(nproc) check-units installcheck VALGRIND=${{ matrix.VALGRIND }}
 
   check-fuzz:
@@ -316,7 +316,7 @@ jobs:
         env:
           CFG: ${{ matrix.CFG }}
         run: |
-          tar -xaf cln-${CFG}.tar.bz2
+          tar -xmaf cln-${CFG}.tar.bz2
 
       - name: Switch network
         if: ${{ matrix.TEST_NETWORK == 'liquid-regtest' }}
@@ -404,7 +404,7 @@ jobs:
           name: cln-compile-gcc.tar.bz2
 
       - name: Unpack build
-        run: tar -xvjf cln-compile-gcc.tar.bz2
+        run: tar -xamf cln-compile-gcc.tar.bz2
 
       - name: Test
         env:
@@ -473,7 +473,7 @@ jobs:
           name: cln-compile-clang-sanitizers.tar.bz2
 
       - name: Unpack build
-        run: tar -xvjf cln-compile-clang-sanitizers.tar.bz2
+        run: tar -xamf cln-compile-clang-sanitizers.tar.bz2
 
       - name: Test
         run: |
@@ -517,7 +517,7 @@ jobs:
           name: cln-compile-gcc.tar.bz2
       - name: Unpack pre-built CLN
         run: |
-          tar -xaf cln-compile-gcc.tar.bz2
+          tar -xamf cln-compile-gcc.tar.bz2
       - name: Test
         run: |
           uv run eatmydata make -j $(nproc) check-doc-examples
@@ -578,7 +578,7 @@ jobs:
         env:
           CFG: ${{ matrix.CFG }}
         run: |
-          tar -xaf cln-${CFG}.tar.bz2
+          tar -xamf cln-${CFG}.tar.bz2
 
       - name: Test
         env: