diff --git a/pkgs/build-support/php/builders/v1/build-composer-project.nix b/pkgs/build-support/php/builders/v1/build-composer-project.nix
index 698391ad1603..912fe7d72f3c 100644
--- a/pkgs/build-support/php/builders/v1/build-composer-project.nix
+++ b/pkgs/build-support/php/builders/v1/build-composer-project.nix
@@ -94,12 +94,6 @@ let
             or (if finalAttrs.composerRepository.composerLock == null then nix-update-script { } else null);
       };
 
-      env = {
-        COMPOSER_CACHE_DIR = "/dev/null";
-        COMPOSER_DISABLE_NETWORK = "1";
-        COMPOSER_MIRROR_PATH_REPOS = "1";
-      };
-
       meta = previousAttrs.meta or { } // {
         platforms = lib.platforms.all;
       };
diff --git a/pkgs/build-support/php/builders/v1/build-composer-repository.nix b/pkgs/build-support/php/builders/v1/build-composer-repository.nix
index 037d8bdeb3eb..c16056ce8fdf 100644
--- a/pkgs/build-support/php/builders/v1/build-composer-repository.nix
+++ b/pkgs/build-support/php/builders/v1/build-composer-repository.nix
@@ -102,13 +102,6 @@ let
           runHook postInstallCheck
         '';
 
-      env = {
-        COMPOSER_CACHE_DIR = "/dev/null";
-        COMPOSER_MIRROR_PATH_REPOS = "1";
-        COMPOSER_HTACCESS_PROTECT = "0";
-        COMPOSER_DISABLE_NETWORK = "0";
-      };
-
       outputHashMode = "recursive";
       outputHashAlgo =
         if (finalAttrs ? vendorHash && finalAttrs.vendorHash != "") then null else "sha256";
diff --git a/pkgs/build-support/php/builders/v1/build-composer-with-plugin.nix b/pkgs/build-support/php/builders/v1/build-composer-with-plugin.nix
index 060b51241e6c..e199000f4f7b 100644
--- a/pkgs/build-support/php/builders/v1/build-composer-with-plugin.nix
+++ b/pkgs/build-support/php/builders/v1/build-composer-with-plugin.nix
@@ -149,12 +149,6 @@ let
             or (if finalAttrs.vendor.composerLock == null then nix-update-script { } else null);
       };
 
-      env = {
-        COMPOSER_CACHE_DIR = "/dev/null";
-        COMPOSER_DISABLE_NETWORK = "1";
-        COMPOSER_MIRROR_PATH_REPOS = "1";
-      };
-
       meta = previousAttrs.meta or composer.meta;
     };
 in
diff --git a/pkgs/build-support/php/builders/v1/hooks/composer-install-hook.sh b/pkgs/build-support/php/builders/v1/hooks/composer-install-hook.sh
index 44e87d06d3a5..d69050ecc6a4 100644
--- a/pkgs/build-support/php/builders/v1/hooks/composer-install-hook.sh
+++ b/pkgs/build-support/php/builders/v1/hooks/composer-install-hook.sh
@@ -24,7 +24,7 @@ composerInstallConfigureHook() {
     fi
 
     if [[ ! -f "composer.lock" ]]; then
-        setComposeRootVersion
+        setComposerRootVersion
 
         composer \
             --no-install \
@@ -79,7 +79,7 @@ composerInstallConfigureHook() {
 composerInstallBuildHook() {
     echo "Executing composerInstallBuildHook"
 
-    setComposeRootVersion
+    setComposerRootVersion
 
     # Since this file cannot be generated in the composer-repository-hook.sh
     # because the file contains hardcoded nix store paths, we generate it here.
@@ -99,7 +99,8 @@ composerInstallCheckHook() {
 composerInstallInstallHook() {
     echo "Executing composerInstallInstallHook"
 
-    setComposeRootVersion
+    setComposerRootVersion
+    setComposerEnvVariables
 
     # Finally, run `composer install` to install the dependencies and generate
     # the autoloader.
diff --git a/pkgs/build-support/php/builders/v1/hooks/composer-repository-hook.sh b/pkgs/build-support/php/builders/v1/hooks/composer-repository-hook.sh
index ec9777541fc0..9d7b048870ee 100644
--- a/pkgs/build-support/php/builders/v1/hooks/composer-repository-hook.sh
+++ b/pkgs/build-support/php/builders/v1/hooks/composer-repository-hook.sh
@@ -20,7 +20,7 @@ composerRepositoryConfigureHook() {
     fi
 
     if [[ ! -f "composer.lock" ]]; then
-        setComposeRootVersion
+        setComposerRootVersion
 
         composer \
             --no-install \
@@ -58,7 +58,7 @@ composerRepositoryBuildHook() {
 
     mkdir -p repository
 
-    setComposeRootVersion
+    setComposerRootVersion
 
     # Build the local composer repository
     # The command 'build-local-repo' is provided by the Composer plugin
diff --git a/pkgs/build-support/php/builders/v1/hooks/composer-with-plugin-vendor-hook.sh b/pkgs/build-support/php/builders/v1/hooks/composer-with-plugin-vendor-hook.sh
index 0d88d14094ad..186b72111cca 100644
--- a/pkgs/build-support/php/builders/v1/hooks/composer-with-plugin-vendor-hook.sh
+++ b/pkgs/build-support/php/builders/v1/hooks/composer-with-plugin-vendor-hook.sh
@@ -28,7 +28,7 @@ composerWithPluginConfigureHook() {
     cp -ar $src $out/src
 
     if [[ ! -f "$out/composer.lock" ]]; then
-        setComposeRootVersion
+        setComposerRootVersion
 
         composer \
             global \
diff --git a/pkgs/build-support/php/builders/v1/hooks/php-script-utils.bash b/pkgs/build-support/php/builders/v1/hooks/php-script-utils.bash
index 65c0a3b410f6..d1b8a25c949d 100644
--- a/pkgs/build-support/php/builders/v1/hooks/php-script-utils.bash
+++ b/pkgs/build-support/php/builders/v1/hooks/php-script-utils.bash
@@ -2,7 +2,7 @@ declare version
 declare composerStrictValidation
 declare composerGlobal
 
-setComposeRootVersion() {
+setComposerRootVersion() {
     set +e # Disable exit on error
 
     if [[ -v version ]]; then
@@ -13,8 +13,15 @@ setComposeRootVersion() {
     set -e
 }
 
+setComposerEnvVariables() {
+    echo -e "\e[32mSetting some required environment variables for Composer...\e[0m"
+    export COMPOSER_MIRROR_PATH_REPOS=1
+    export COMPOSER_CACHE_DIR=/dev/null
+    export COMPOSER_HTACCESS_PROTECT=0
+}
+
 checkComposerValidate() {
-    setComposeRootVersion
+    setComposerRootVersion
 
     if [ "1" == "${composerGlobal-}" ]; then
       global="global";
diff --git a/pkgs/build-support/php/builders/v2/build-composer-project.nix b/pkgs/build-support/php/builders/v2/build-composer-project.nix
index 6013225e7c59..bfbd2327812b 100644
--- a/pkgs/build-support/php/builders/v2/build-composer-project.nix
+++ b/pkgs/build-support/php/builders/v2/build-composer-project.nix
@@ -94,12 +94,6 @@ let
             or (if finalAttrs.composerVendor.composerLock == null then nix-update-script { } else null);
       };
 
-      env = {
-        COMPOSER_CACHE_DIR = "/dev/null";
-        COMPOSER_DISABLE_NETWORK = "1";
-        COMPOSER_MIRROR_PATH_REPOS = "1";
-      };
-
       meta = previousAttrs.meta or { } // {
         platforms = lib.platforms.all;
       };
diff --git a/pkgs/build-support/php/builders/v2/build-composer-vendor.nix b/pkgs/build-support/php/builders/v2/build-composer-vendor.nix
index b68e16e6cc1a..cbbe643d20f1 100644
--- a/pkgs/build-support/php/builders/v2/build-composer-vendor.nix
+++ b/pkgs/build-support/php/builders/v2/build-composer-vendor.nix
@@ -87,13 +87,6 @@ let
           runHook postInstallCheck
         '';
 
-      env = {
-        COMPOSER_CACHE_DIR = "/dev/null";
-        COMPOSER_MIRROR_PATH_REPOS = "1";
-        COMPOSER_HTACCESS_PROTECT = "0";
-        COMPOSER_DISABLE_NETWORK = "0";
-      };
-
       outputHashMode = "recursive";
       outputHashAlgo =
         if (finalAttrs ? vendorHash && finalAttrs.vendorHash != "") then null else "sha256";
diff --git a/pkgs/build-support/php/builders/v2/hooks/composer-install-hook.sh b/pkgs/build-support/php/builders/v2/hooks/composer-install-hook.sh
index 7cc176058b50..0b04af622233 100644
--- a/pkgs/build-support/php/builders/v2/hooks/composer-install-hook.sh
+++ b/pkgs/build-support/php/builders/v2/hooks/composer-install-hook.sh
@@ -14,7 +14,7 @@ source @phpScriptUtils@
 composerInstallConfigureHook() {
     echo "Executing composerInstallConfigureHook"
 
-    setComposeRootVersion
+    setComposerRootVersion
 
     if [[ ! -e "${composerVendor}" ]]; then
         echo "No local composer vendor found."
diff --git a/pkgs/build-support/php/builders/v2/hooks/composer-vendor-hook.sh b/pkgs/build-support/php/builders/v2/hooks/composer-vendor-hook.sh
index f6d1157456f7..24f3eaa2744e 100644
--- a/pkgs/build-support/php/builders/v2/hooks/composer-vendor-hook.sh
+++ b/pkgs/build-support/php/builders/v2/hooks/composer-vendor-hook.sh
@@ -15,7 +15,7 @@ source @phpScriptUtils@
 composerVendorConfigureHook() {
     echo "Executing composerVendorConfigureHook"
 
-    setComposeRootVersion
+    setComposerRootVersion
 
     if [[ -e "$composerLock" ]]; then
         echo -e "\e[32mUsing user provided \`composer.lock\` file from \`$composerLock\`\e[0m"
@@ -59,11 +59,13 @@ composerVendorConfigureHook() {
 composerVendorBuildHook() {
     echo "Executing composerVendorBuildHook"
 
+    setComposerEnvVariables
+
     composer \
-        # The acpu-autoloader is not reproducible and has to be disabled.
-        # Upstream PR: https://github.com/composer/composer/pull/12090
-        # --apcu-autoloader \
-        # --apcu-autoloader-prefix="$(jq -r -c 'try ."content-hash"' < composer.lock)" \
+        `# The acpu-autoloader is not reproducible and has to be disabled.` \
+        `# Upstream PR: https://github.com/composer/composer/pull/12090` \
+        `# --apcu-autoloader` \
+        `# --apcu-autoloader-prefix="$(jq -r -c 'try ."content-hash"' < composer.lock)"` \
         --no-interaction \
         --no-progress \
         --optimize-autoloader \
diff --git a/pkgs/build-support/php/builders/v2/hooks/php-script-utils.bash b/pkgs/build-support/php/builders/v2/hooks/php-script-utils.bash
index 3e8299bf15d3..573b82c2baff 100644
--- a/pkgs/build-support/php/builders/v2/hooks/php-script-utils.bash
+++ b/pkgs/build-support/php/builders/v2/hooks/php-script-utils.bash
@@ -2,7 +2,7 @@ declare version
 declare composerStrictValidation
 declare composerGlobal
 
-setComposeRootVersion() {
+setComposerRootVersion() {
     set +e # Disable exit on error
 
     if [[ -v version ]]; then
@@ -13,6 +13,13 @@ setComposeRootVersion() {
     set -e
 }
 
+setComposerEnvVariables() {
+    echo -e "\e[32mSetting some required environment variables for Composer...\e[0m"
+    export COMPOSER_MIRROR_PATH_REPOS=1
+    export COMPOSER_CACHE_DIR=/dev/null
+    export COMPOSER_HTACCESS_PROTECT=0
+}
+
 checkComposerValidate() {
     if [ "1" == "${composerGlobal-}" ]; then
       global="global";