diff --git a/steps-guix/guix-1.5.0/pass1.sh b/steps-guix/guix-1.5.0/pass1.sh
index 7cf08eba..a38b3bdf 100755
--- a/steps-guix/guix-1.5.0/pass1.sh
+++ b/steps-guix/guix-1.5.0/pass1.sh
@@ -3,7 +3,7 @@
 : "${KERNEL_SYSROOT:=/kernel-toolchain}"
 
 src_prepare() {
-    local bootstrap_scm patch_template rendered_patch
+    local patch_template rendered_patch
     local mes_patch_template rendered_mes_patch
 
     default
@@ -18,21 +18,11 @@ src_prepare() {
     fi
     . /tmp/guix-bootstrap-seeds.env
 
-    bootstrap_scm="gnu/packages/bootstrap.scm"
     patch_template="${base_dir}/patches/bootstrap-local-seeds.patch.in"
     rendered_patch="/tmp/guix-bootstrap-local-seeds.patch"
     mes_patch_template="${base_dir}/patches/bootstrap-local-mes-extra.patch.in"
     rendered_mes_patch="/tmp/guix-bootstrap-local-mes-extra.patch"
 
-    if [ ! -f "${patch_template}" ]; then
-        echo "Missing patch template: ${patch_template}" >&2
-        false
-    fi
-    if [ ! -f "${mes_patch_template}" ]; then
-        echo "Missing patch template: ${mes_patch_template}" >&2
-        false
-    fi
-
     sed \
         -e "s|@EXEC_BASH_HASH@|${EXEC_BASH_HASH}|g" \
         -e "s|@EXEC_MKDIR_HASH@|${EXEC_MKDIR_HASH}|g" \
@@ -48,41 +38,9 @@ src_prepare() {
         -e "s|@MESCC_TOOLS_SEED_HASH@|${MESCC_TOOLS_SEED_HASH}|g" \
         "${mes_patch_template}" > "${rendered_mes_patch}"
 
-    if grep -Eq '@[A-Z0-9_]+@' "${rendered_patch}"; then
-        echo "Unexpanded placeholder found in ${rendered_patch}" >&2
-        false
-    fi
-    if grep -Eq '@[A-Z0-9_]+@' "${rendered_mes_patch}"; then
-        echo "Unexpanded placeholder found in ${rendered_mes_patch}" >&2
-        false
-    fi
-    patch --dry-run -p1 < "${rendered_patch}"
     patch -p1 < "${rendered_patch}"
-    patch --dry-run -p1 < "${rendered_mes_patch}"
     patch -p1 < "${rendered_mes_patch}"
 
-    grep -q '127.0.0.1:38445' "${bootstrap_scm}"
-    grep -q "${EXEC_BASH_HASH}" "${bootstrap_scm}"
-    grep -q "${STATIC_BINARIES_SEED_HASH}" "${bootstrap_scm}"
-    grep -q "${GUILE_SEED_HASH}" "${bootstrap_scm}"
-    grep -q "${MES_MINIMAL_SEED_HASH}" "${bootstrap_scm}"
-    grep -q "${MESCC_TOOLS_SEED_HASH}" "${bootstrap_scm}"
-    grep -q "All bootstrap binaries must come from the local bootstrap mirror." "${bootstrap_scm}"
-    grep -q "%bootstrap-linux-headers-base-urls" "${bootstrap_scm}"
-    grep -q '^(define (bootstrap-mes-minimal-origin system)' "${bootstrap_scm}"
-    grep -q '^(define %bootstrap-mescc-tools' "${bootstrap_scm}"
-    grep -q "mes-minimal-stripped-0.19-i686-linux.tar.xz" "${bootstrap_scm}"
-    grep -q "mescc-tools-static-stripped-0.5.2-i686-linux.tar.xz" "${bootstrap_scm}"
-    grep -q '("mes-minimal" ,%bootstrap-mes-minimal)' "${bootstrap_scm}"
-    grep -q '("mescc-tools" ,%bootstrap-mescc-tools)' "${bootstrap_scm}"
-    grep -q "Offline bootstrap environment: require explicit channels." guix/channels.scm
-
-    # Regenerate autotools files with tool names available in this environment.
-    ACLOCAL=aclocal \
-    AUTOCONF=autoconf \
-    AUTOHEADER=autoheader \
-    AUTOMAKE=automake \
-    AUTOPOINT=true \
     autoreconf -fi
 }