diff --git a/src/ci/scripts/dump-environment.sh b/src/ci/scripts/dump-environment.sh
index 812690181e9..7afaa472f6e 100755
--- a/src/ci/scripts/dump-environment.sh
+++ b/src/ci/scripts/dump-environment.sh
@@ -15,9 +15,7 @@ df -h
 echo
 
 echo "biggest files in the working dir:"
-set +o pipefail
-du . | sort -nr | head -n100
-set -o pipefail
+du . | sort -n | tail -n100 | sort -nr # because piping sort to head gives a broken pipe
 echo
 
 if isMacOS
diff --git a/src/ci/scripts/select-xcode.sh b/src/ci/scripts/select-xcode.sh
index 569c4a4136d..d635d438472 100755
--- a/src/ci/scripts/select-xcode.sh
+++ b/src/ci/scripts/select-xcode.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
 # This script selects the Xcode instance to use.
+# It also tries to do some cleanup in CI jobs of unused Xcodes.
 
 set -euo pipefail
 IFS=$'\n\t'
@@ -7,5 +8,21 @@ IFS=$'\n\t'
 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
 
 if isMacOS; then
+    # This additional step is to try to remove an Xcode we aren't using because each one is HUGE
+    old_xcode="$(xcode-select --print-path)"
+    old_xcode="${old_xcode%/*}" # pop a dir
+    old_xcode="${old_xcode%/*}" # twice
+    if [[ $old_xcode =~ $SELECT_XCODE ]]; then
+        echo "xcode-select.sh's brutal hack may not be necessary?"
+        exit 1
+    elif [[ $SELECT_XCODE =~ "16" ]]; then
+        echo "Using Xcode 16? Please fix xcode-select.sh"
+        exit 1
+    fi
+    if [ $CI ]; then # just in case someone sources this on their real computer
+        sudo rm -rf "${old_xcode}"
+        xcode_16="${old_xcode%/*}/Xcode-16.0.0.app"
+        sudo rm -rf "${xcode_16}"
+    fi
     sudo xcode-select -s "${SELECT_XCODE}"
 fi
diff --git a/src/ci/scripts/upload-artifacts.sh b/src/ci/scripts/upload-artifacts.sh
index c9c85ec20b4..61c187fa77c 100755
--- a/src/ci/scripts/upload-artifacts.sh
+++ b/src/ci/scripts/upload-artifacts.sh
@@ -19,18 +19,18 @@ fi
 if [[ "${DEPLOY-0}" -eq "1" ]] || [[ "${DEPLOY_ALT-0}" -eq "1" ]]; then
     dist_dir="${build_dir}/dist"
     rm -rf "${dist_dir}/doc"
-    cp -r "${dist_dir}"/* "${upload_dir}"
+    mv "${dist_dir}"/* "${upload_dir}"
 fi
 
 # CPU usage statistics.
-cp build/cpu-usage.csv "${upload_dir}/cpu-${CI_JOB_NAME}.csv"
+mv build/cpu-usage.csv "${upload_dir}/cpu-${CI_JOB_NAME}.csv"
 
 # Build metrics generated by x.py.
-cp "${build_dir}/metrics.json" "${upload_dir}/metrics-${CI_JOB_NAME}.json"
+mv "${build_dir}/metrics.json" "${upload_dir}/metrics-${CI_JOB_NAME}.json"
 
 # Toolstate data.
 if [[ -n "${DEPLOY_TOOLSTATES_JSON+x}" ]]; then
-    cp /tmp/toolstate/toolstates.json "${upload_dir}/${DEPLOY_TOOLSTATES_JSON}"
+    mv /tmp/toolstate/toolstates.json "${upload_dir}/${DEPLOY_TOOLSTATES_JSON}"
 fi
 
 echo "Files that will be uploaded:"
@@ -55,7 +55,7 @@ then
   echo "# CI artifacts" >> "${GITHUB_STEP_SUMMARY}"
 
   for filename in "${upload_dir}"/*.xz; do
-    filename=`basename "${filename}"`
+    filename=$(basename "${filename}")
     echo "- [${filename}](${access_url}/${filename})" >> "${GITHUB_STEP_SUMMARY}"
   done
 fi