diff --git a/.ci/compilation.sh b/.ci/compilation.sh
index 295108bc..1ae616a6 100755
--- a/.ci/compilation.sh
+++ b/.ci/compilation.sh
@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -x
 set -e
 
-EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-~}"/"${1:-.emacs.d}"; pwd -P)"
+EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-${HOME}}/${1:-.emacs.d}" && pwd -P)"
 EMACS=${EMACS:=emacs}
 
 exit_code=0
@@ -16,42 +16,20 @@ cleanup () {
 
 trap cleanup ERR INT TERM
 
-# Byte compile all `.el` files in modules and themes.
-# extensions are skipped because this is not Exordium code.
-# themes are compiled separately because CI core dumps when compiled together with modules
+# Byte compile init.el and all *.el files in modules and themes directories.
+# Directory extensions is skipped because this is not Exordium code.  Split
+# them into smaller chunks, because Emacs on GitHub worker tends to core dump
+# when there's too much to compile in one go.
+for pattern in "init.el" "modules/*.el" ; do
+    echo "===Byte compiling ${pattern}==="
 
-${EMACS} -Q --batch \
-         --eval '
-(progn
-   (setq debug-on-error t
-         eval-expression-print-length 100
-         edebug-print-length 500
-         user-emacs-directory "'"${EMACS_DIR}"'/"
-         exordium-spell-check nil
-         tree-sitter-langs--testing t) ; tree-sitter-langs is for pre Emacs-29
-   (load-file "'"${EMACS_DIR}"'/init.el")
-   (setq exordium--require-package-archives package-archives)
-   (message "===Byte compilation start===")
-   (batch-byte-compile))' \
-         "${EMACS_DIR}"/init.el
-
-${EMACS} -Q --batch \
-         --eval '
-(progn
-   (setq debug-on-error t
-         eval-expression-print-length 100
-         edebug-print-length 500
-         user-emacs-directory "'"${EMACS_DIR}"'/"
-         exordium-spell-check nil
-         tree-sitter-langs--testing t) ; tree-sitter-langs is for pre Emacs-29
-   (load-file "'"${EMACS_DIR}"'/init.el")
-   (setq exordium--require-package-archives package-archives)
-   (message "===Byte compilation start===")
-   (batch-byte-compile))' \
-         "${EMACS_DIR}"/modules/*.el
+    # Use find to find file names such that globs are expanded while prevent
+    # splitting paths on spaces
+    mapfile -t files <<< \
+            "$(find "${EMACS_DIR}" -path "${EMACS_DIR}/${pattern}")"
 
-${EMACS} -Q --batch \
-         --eval '
+    ${EMACS} -Q --batch \
+             --eval '
 (progn
    (setq debug-on-error t
          eval-expression-print-length 100
@@ -63,6 +41,7 @@ ${EMACS} -Q --batch \
    (setq exordium--require-package-archives package-archives)
    (message "===Byte compilation start===")
    (batch-byte-compile))' \
-         "${EMACS_DIR}"/themes/*.el
+             "${files[@]}"
+done
 
 cleanup
diff --git a/.ci/first-start.sh b/.ci/first-start.sh
index 7555c446..e8214073 100755
--- a/.ci/first-start.sh
+++ b/.ci/first-start.sh
@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -x
 set -e
 
-EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-~}"/"${1:-.emacs.d}"; pwd -P)"
+EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-${HOME}}/${1:-.emacs.d}" && pwd -P)"
 EMACS=${EMACS:=emacs}
 
 # Redefine ask-user-about-lock as the melpa seems to stumble on it
diff --git a/.ci/unit-test-cl.sh b/.ci/unit-test-cl.sh
index 910e14f8..e3cfb5ed 100755
--- a/.ci/unit-test-cl.sh
+++ b/.ci/unit-test-cl.sh
@@ -1,8 +1,8 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -x
 set -e
-EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-~}"/"${1:-.emacs.d}"; pwd -P)"
+EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-${HOME}}/${1:-.emacs.d}" && pwd -P)"
 EMACS=${EMACS:=emacs}
 
 ${EMACS} -Q --batch \
diff --git a/.ci/unit-tests.sh b/.ci/unit-tests.sh
index 1215402e..6c81fc57 100755
--- a/.ci/unit-tests.sh
+++ b/.ci/unit-tests.sh
@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -x
 set -e
 
-EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-~}"/"${1:-.emacs.d}"; pwd -P)"
+EMACS_DIR="$(cd "${GITHUB_WORKSPACE:-${HOME}}/${1:-.emacs.d}" && pwd -P)"
 EMACS=${EMACS:=emacs}
 
 # Run all tests form *.t.el