guix: Appease shellcheck.

Author: dongcarl

contrib/guix/guix-build.sh

@@ -22,6 +22,7 @@ time-machine() {
 }
 
 # Deterministically build Bitcoin Core for HOSTs (overriable by environment)
+# shellcheck disable=SC2153
 for host in ${HOSTS=x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu x86_64-w64-mingw32}; do
 
     # Display proper warning when the user interrupts the build

contrib/guix/libexec/build.sh

@@ -55,10 +55,10 @@ case "$HOST" in
         export CROSS_LIBRARY_PATH="${CROSS_GCC}/lib:${CROSS_GCC}/${HOST}/lib:${CROSS_GCC_LIB}:${CROSS_GLIBC}/lib"
         ;;
     *linux*)
-        CROSS_GLIBC="$(store_path glibc-cross-${HOST})"
-        CROSS_GLIBC_STATIC="$(store_path glibc-cross-${HOST} static)"
-        CROSS_KERNEL="$(store_path linux-libre-headers-cross-${HOST})"
-        CROSS_GCC="$(store_path gcc-cross-${HOST})"
+        CROSS_GLIBC="$(store_path "glibc-cross-${HOST}")"
+        CROSS_GLIBC_STATIC="$(store_path "glibc-cross-${HOST}" static)"
+        CROSS_KERNEL="$(store_path "linux-libre-headers-cross-${HOST}")"
+        CROSS_GCC="$(store_path "gcc-cross-${HOST}")"
         CROSS_GCC_LIBS=( "${CROSS_GCC}/lib/gcc/${HOST}"/* ) # This expands to an array of directories...
         CROSS_GCC_LIB="${CROSS_GCC_LIBS[0]}" # ...we just want the first one (there should only be one)