diff --git a/.github/workflows/aarch64.yml b/.github/workflows/aarch64.yml
index 5aed54916..023e2888f 100644
--- a/.github/workflows/aarch64.yml
+++ b/.github/workflows/aarch64.yml
@@ -34,7 +34,9 @@ jobs:
           distro: ubuntu22.04
           install: |
             apt-get update -q -y
-            apt-get install -y cmake make g++ ninja-build git
+            apt-get install -y cmake make g++-12 ninja-build git gcc-12
+            ln -s -f /usr/bin/gcc-12 /usr/bin/gcc
+            ln -s -f /usr/bin/g++-12 /usr/bin/g++
           run: |
             cmake -DCMAKE_CXX_STANDARD=20 -B build
             cmake --build build
diff --git a/include/ada/helpers.h b/include/ada/helpers.h
index 91077e940..b9a553c02 100644
--- a/include/ada/helpers.h
+++ b/include/ada/helpers.h
@@ -102,7 +102,7 @@ bool overlaps(std::string_view input1, const std::string& input2) noexcept;
  * Return the substring from input going from index pos1 to the pos2 (non
  * included). The length of the substring is pos2 - pos1.
  */
-ada_really_inline constexpr std::string_view substring(const std::string& input,
+ada_really_inline constexpr std::string_view substring(std::string_view input,
                                                        size_t pos1,
                                                        size_t pos2) noexcept {
 #if ADA_DEVELOPMENT_CHECKS
@@ -112,7 +112,7 @@ ada_really_inline constexpr std::string_view substring(const std::string& input,
     abort();
   }
 #endif
-  return std::string_view(input.data() + pos1, pos2 - pos1);
+  return input.substr(pos1, pos2 - pos1);
 }
 
 /**