diff --git a/contrib/guix/guix-attest b/contrib/guix/guix-attest
index 84fb2840ea..7c71ff3508 100755
--- a/contrib/guix/guix-attest
+++ b/contrib/guix/guix-attest
@@ -213,8 +213,8 @@ mkdir -p "$outsigdir"
         exit 1
     fi
 
-    temp_codesigned="$(mktemp)"
-    trap 'rm -rf -- "$temp_codesigned"' EXIT
+    temp_all="$(mktemp)"
+    trap 'rm -rf -- "$temp_all"' EXIT
 
     if (( ${#codesigned_fragments[@]} )); then
         # Note: all.SHA256SUMS attests to all of $sha256sum_fragments, but is
@@ -222,20 +222,19 @@ mkdir -p "$outsigdir"
         cat "${sha256sum_fragments[@]}" \
             | sort -u \
             | sort -k2 \
-            | sed 's/$/\r/' \
             | basenameify_SHA256SUMS \
-                > "$temp_codesigned"
-        if [ -e codesigned.SHA256SUMS ]; then
+                > "$temp_all"
+        if [ -e all.SHA256SUMS ]; then
             # The SHA256SUMS already exists, make sure it's exactly what we
             # expect, error out if not
-            if diff -u all.SHA256SUMS "$temp_codesigned"; then
+            if diff -u all.SHA256SUMS "$temp_all"; then
                 echo "An all.SHA256SUMS file already exists for '${VERSION}' and is up-to-date."
             else
                 shasum_already_exists all.SHA256SUMS
                 exit 1
             fi
         else
-            mv "$temp_codesigned" codesigned.SHA256SUMS
+            mv "$temp_all" all.SHA256SUMS
         fi
     else
         # It is fine to have the codesigned outputs be missing (perhaps the
diff --git a/contrib/guix/guix-build b/contrib/guix/guix-build
index 176eab32f9..0d7ecfa271 100755
--- a/contrib/guix/guix-build
+++ b/contrib/guix/guix-build
@@ -233,7 +233,7 @@ host_to_commonname() {
 }
 
 # Determine the reference time used for determinism (overridable by environment)
-SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git log --format=%at -1)}"
+SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git -c log.showSignature=false log --format=%at -1)}"
 
 # Precious directories are those which should not be cleaned between successive
 # guix builds
diff --git a/contrib/guix/guix-codesign b/contrib/guix/guix-codesign
index 45da43abf1..445ee91172 100755
--- a/contrib/guix/guix-codesign
+++ b/contrib/guix/guix-codesign
@@ -220,7 +220,7 @@ fi
 JOBS="${JOBS:-$(nproc)}"
 
 # Determine the reference time used for determinism (overridable by environment)
-SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git log --format=%at -1)}"
+SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git -c log.showSignature=false log --format=%at -1)}"
 
 # Make sure an output directory exists for our builds
 OUTDIR_BASE="${OUTDIR_BASE:-${VERSION_BASE}/output}"
diff --git a/contrib/guix/guix-verify b/contrib/guix/guix-verify
index ffcfba7360..feb0e55ea0 100755
--- a/contrib/guix/guix-verify
+++ b/contrib/guix/guix-verify
@@ -28,7 +28,11 @@ cmd_usage() {
 cat <<EOF
 Synopsis:
 
-    env GUIX_SIGS_REPO=<path/to/guix.sigs> ./contrib/guix/guix-verify
+    env GUIX_SIGS_REPO=<path/to/guix.sigs> [ SIGNER=<signer> ] ./contrib/guix/guix-verify
+
+Example overriding signer's manifest to use as base
+
+    env GUIX_SIGS_REPO=/home/dongcarl/guix.sigs SIGNER=achow101 ./contrib/guix/guix-verify
 
 EOF
 }
@@ -94,6 +98,17 @@ echo "--------------------"
 echo ""
 if (( ${#all_noncodesigned[@]} )); then
     compare_noncodesigned="${all_noncodesigned[0]}"
+    if [[ -n "$SIGNER" ]]; then
+        signer_noncodesigned="$OUTSIGDIR_BASE/$SIGNER/noncodesigned.SHA256SUMS"
+        if [[ -f "$signer_noncodesigned" ]]; then
+            echo "Using $SIGNER's manifest as the base to compare against"
+            compare_noncodesigned="$signer_noncodesigned"
+        else
+            echo "Unable to find $SIGNER's manifest, using the first one found"
+        fi
+    else
+        echo "No SIGNER provided, using the first manifest found"
+    fi
 
     for current_manifest in "${all_noncodesigned[@]}"; do
         verify "$compare_noncodesigned" "$current_manifest"
@@ -114,6 +129,17 @@ echo "--------------------"
 echo ""
 if (( ${#all_all[@]} )); then
     compare_all="${all_all[0]}"
+    if [[ -n "$SIGNER" ]]; then
+        signer_all="$OUTSIGDIR_BASE/$SIGNER/all.SHA256SUMS"
+        if [[ -f "$signer_all" ]]; then
+            echo "Using $SIGNER's manifest as the base to compare against"
+            compare_all="$signer_all"
+        else
+            echo "Unable to find $SIGNER's manifest, using the first one found"
+        fi
+    else
+        echo "No SIGNER provided, using the first manifest found"
+    fi
 
     for current_manifest in "${all_all[@]}"; do
         verify "$compare_all" "$current_manifest"
diff --git a/doc/release-process.md b/doc/release-process.md
index c7a804e679..eaec5c5940 100644
--- a/doc/release-process.md
+++ b/doc/release-process.md
@@ -145,6 +145,9 @@ Codesigner only: Sign the windows binaries:
 * Enter the passphrase for the key when prompted
 * `signature-win.tar.gz` will be created
 
+Code-signer only: It is advised to test that the code signature attaches properly prior to tagging by performing the `guix-codesign` step.
+However if this is done, once the release has been tagged in the bitcoin-detached-sigs repo, the `guix-codesign` step must be performed again in order for the guix attestation to be valid when compared against the attestations of non-codesigner builds.
+
 Codesigner only: Commit the detached codesign payloads:
 
 ```sh