fix(steps-guix): add expat-2.7.4 before dbus and pin dbus cmake search paths to PREFIX

steps-guix/dbus-1.16.2/pass1.sh

@@ -13,6 +13,9 @@ src_configure() {
         -DCMAKE_INSTALL_PREFIX="${PREFIX}" \
         -DCMAKE_INSTALL_LIBDIR="${LIBDIR}" \
         -DCMAKE_INSTALL_INCLUDEDIR="${PREFIX}/include" \
+        -DCMAKE_PREFIX_PATH="${PREFIX}" \
+        -DCMAKE_INCLUDE_PATH="${PREFIX}/include" \
+        -DCMAKE_LIBRARY_PATH="${LIBDIR}:${PREFIX}/lib" \
         -DBUILD_SHARED_LIBS=ON \
         -DDBUS_BUILD_TESTS=OFF \
         -DDBUS_ENABLE_XML_DOCS=OFF \

steps-guix/expat-2.7.4/pass1.sh

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+}
+
+src_configure() {
+    local host_triplet
+    host_triplet="$(gcc -dumpmachine)"
+
+    PATH="${PREFIX}/bin:/usr/bin:/bin" \
+    PKG_CONFIG_PATH="${LIBDIR}/pkgconfig:${PREFIX}/lib/pkgconfig" \
+    ./configure \
+        --prefix="${PREFIX}" \
+        --libdir="${LIBDIR}" \
+        --includedir="${PREFIX}/include" \
+        --host="${host_triplet}" \
+        --build="${host_triplet}" \
+        --enable-static \
+        --enable-shared
+}
+
+src_compile() {
+    default_src_compile
+}
+
+src_install() {
+    default_src_install
+}

steps-guix/expat-2.7.4/sources

@@ -0,0 +1 @@
+f https://github.com/libexpat/libexpat/releases/download/R_2_7_4/expat-2.7.4.tar.gz 461ecc8aa98ab1a68c2db788175665d1a4db640dc05bf0e289b6ea17122144ec expat-2.7.4.tar.gz

steps-guix/manifest

@@ -18,6 +18,7 @@ build: libgpg-error-1.59
 build: libgcrypt-1.12.1
 build: guile-gcrypt-0.5.0
 build: git-2.53.0
+# CMake for libgit2 and DBus
 build: cmake-4.2.3
 build: libgit2-1.9.2
 build: nettle-3.10.2
@@ -31,6 +32,7 @@ build: guile-zlib-0.2.2
 build: guile-lzlib-0.0.2
 build: scheme-bytestructures-2.0.2
 build: libevent-2.1.12
+build: expat-2.7.4
 build: dbus-1.16.2
 build: avahi-0.8
 build: guile-avahi-0.4.1