build: ask apt for libboost-dev, and update the package lists first

libboost-system-dev is gone from Ubuntu 26.04 -- Boost.System has been
header-only since 1.69, and this tree only includes two boost headers
and links no boost library. The recipe also installed without an
apt-get update, so a fresh image failed on stale or empty lists.

Closes #28

1 files changed, 7 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 83a2c73..0eec4c2 100644
--- a/Makefile
+++ b/Makefile
@@ -89,11 +89,17 @@ linux-node: deps-linux
 
 deps-linux: deps-apt deps-secp256k1 deps-randomx
 
+# libboost-dev, not libboost-system-dev: Boost.System has been header-only
+# since 1.69 and Ubuntu 26.04 (resolute) no longer ships the -system package.
+# This tree only includes two boost headers and links no boost library. The
+# apt-get update comes first: a fresh image's package lists are empty, and
+# install then fails on the first name it cannot find.
 deps-apt:
         @if command -v apt-get >/dev/null 2>&1; then \
+          $(SUDO) apt-get update; \
           $(SUDO) apt-get install -y build-essential cmake git pkg-config autoconf \
             libtool libssl-dev libdb5.3++-dev libsodium-dev nlohmann-json3-dev \
-            libboost-system-dev libglfw3-dev libgl-dev python3-pil clang; \
+            libboost-dev libglfw3-dev libgl-dev python3-pil clang; \
         else \
           echo "Not an apt system — install: g++ cmake git autoconf libtool"; \
           echo "  libssl libdb++ libsodium nlohmann-json boost glfw3 opengl python3-pil"; \