diff --git a/mirror/1.19/Dockerfile b/mirror/1.19/Dockerfile
index a7a2a029..86bba14e 100644
--- a/mirror/1.19/Dockerfile
+++ b/mirror/1.19/Dockerfile
@@ -20,3 +20,9 @@ LABEL org.opencontainers.image.description="Docker image intended to mirror \
     latest upstream golang image for the Go 1.19 series. Used by \
     Makefile-driven test, linting and build tasks."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
+
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
diff --git a/mirror/1.20/Dockerfile b/mirror/1.20/Dockerfile
index e8363dce..6d369b30 100644
--- a/mirror/1.20/Dockerfile
+++ b/mirror/1.20/Dockerfile
@@ -20,3 +20,9 @@ LABEL org.opencontainers.image.description="Docker image intended to mirror \
     latest upstream golang image for the Go 1.20 series. Used by \
     Makefile-driven test, linting and build tasks."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
+
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
diff --git a/mirror/1.21/Dockerfile b/mirror/1.21/Dockerfile
index c5ca684f..c349a2d7 100644
--- a/mirror/1.21/Dockerfile
+++ b/mirror/1.21/Dockerfile
@@ -20,3 +20,9 @@ LABEL org.opencontainers.image.description="Docker image intended to mirror \
     latest upstream golang image for the Go 1.21 series. Used by \
     Makefile-driven test, linting and build tasks."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
+
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
diff --git a/oldstable/build/alpine-x64/Dockerfile b/oldstable/build/alpine-x64/Dockerfile
index cc70666f..5ec9b3ad 100644
--- a/oldstable/build/alpine-x64/Dockerfile
+++ b/oldstable/build/alpine-x64/Dockerfile
@@ -22,6 +22,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     Linux."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # NOTE: This version was different than the base `gcc` pkg when last checked
 ENV APK_GCC_MINGW64_VERSION="12.2.0-r3"
 
diff --git a/oldstable/build/alpine-x86/Dockerfile b/oldstable/build/alpine-x86/Dockerfile
index 3ec91025..daaf6138 100644
--- a/oldstable/build/alpine-x86/Dockerfile
+++ b/oldstable/build/alpine-x86/Dockerfile
@@ -21,6 +21,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     image. Supports cross-platform, static cgo-enabled builds for Windows and Linux."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # NOTE: This version was different than the base `gcc` pkg when last checked
 ENV APK_GCC_MINGW64_VERSION="12.2.0-r3"
 
diff --git a/oldstable/build/release/Dockerfile b/oldstable/build/release/Dockerfile
index d42bff5a..60441962 100644
--- a/oldstable/build/release/Dockerfile
+++ b/oldstable/build/release/Dockerfile
@@ -20,6 +20,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     releases of Go code. Based on the latest version of the upstream oldstable golang image."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 ENV APT_BSDMAINUTILS_VERSION="12.1.8"
 ENV APT_TREE_VERSION="2.1.0-1"
 ENV XZ_UTILS_VERSION="5.4.1-0.2"
diff --git a/oldstable/combined/Dockerfile b/oldstable/combined/Dockerfile
index 768e5bf7..64f5c18f 100644
--- a/oldstable/combined/Dockerfile
+++ b/oldstable/combined/Dockerfile
@@ -20,6 +20,12 @@ LABEL org.opencontainers.image.description="Docker container image used to lint,
     Based on the latest version of the current outgoing stable golang image."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 ENV GOLANGCI_LINT_VERSION="v1.55.1"
 ENV STATICCHECK_VERSION="v0.4.6"
 ENV GOVULNCHECK_VERSION="v1.0.1"
diff --git a/stable/build/alpine-x64/Dockerfile b/stable/build/alpine-x64/Dockerfile
index ed2cc1da..1fa27720 100644
--- a/stable/build/alpine-x64/Dockerfile
+++ b/stable/build/alpine-x64/Dockerfile
@@ -22,6 +22,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     Linux."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # NOTE: This version was different than the base `gcc` pkg when last checked
 ENV APK_GCC_MINGW64_VERSION="12.2.0-r3"
 
diff --git a/stable/build/alpine-x86/Dockerfile b/stable/build/alpine-x86/Dockerfile
index 33a07f82..804aab17 100644
--- a/stable/build/alpine-x86/Dockerfile
+++ b/stable/build/alpine-x86/Dockerfile
@@ -21,6 +21,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     image. Supports cross-platform, static cgo-enabled builds for Windows and Linux."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # NOTE: This version was different than the base `gcc` pkg when last checked
 ENV APK_GCC_MINGW64_VERSION="12.2.0-r3"
 
diff --git a/stable/build/cgo-mingw-w64/Dockerfile b/stable/build/cgo-mingw-w64/Dockerfile
index 2e1a88cd..7712849e 100644
--- a/stable/build/cgo-mingw-w64/Dockerfile
+++ b/stable/build/cgo-mingw-w64/Dockerfile
@@ -21,6 +21,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     Supports static, cgo-enabled builds via mingw."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 ENV APT_BSDMAINUTILS_VERSION="12.1.8"
 ENV APT_TREE_VERSION="2.1.0-1"
 ENV APT_GCC_MULTILIB_VERSION="4:12.2.0-3"
diff --git a/stable/build/release/Dockerfile b/stable/build/release/Dockerfile
index bf40ed44..26a1d3de 100644
--- a/stable/build/release/Dockerfile
+++ b/stable/build/release/Dockerfile
@@ -20,6 +20,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     releases of Go code. Based on the latest version of the upstream stable golang image."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 ENV APT_BSDMAINUTILS_VERSION="12.1.8"
 ENV APT_TREE_VERSION="2.1.0-1"
 ENV XZ_UTILS_VERSION="5.4.1-0.2"
diff --git a/stable/combined/Dockerfile b/stable/combined/Dockerfile
index b74a97f6..d9906796 100644
--- a/stable/combined/Dockerfile
+++ b/stable/combined/Dockerfile
@@ -20,6 +20,12 @@ LABEL org.opencontainers.image.description="Docker container image used to lint,
     Based on the latest version of the current stable golang image."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 ENV GOLANGCI_LINT_VERSION="v1.55.1"
 ENV STATICCHECK_VERSION="v0.4.6"
 ENV GOVULNCHECK_VERSION="v1.0.1"
diff --git a/unstable/build/alpine-x64/Dockerfile b/unstable/build/alpine-x64/Dockerfile
index e237bc22..903f651d 100644
--- a/unstable/build/alpine-x64/Dockerfile
+++ b/unstable/build/alpine-x64/Dockerfile
@@ -22,6 +22,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     Windows and Linux."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # NOTE: This version was different than the base `gcc` pkg when last checked
 ENV APK_GCC_MINGW64_VERSION="12.2.0-r3"
 
diff --git a/unstable/build/alpine-x86/Dockerfile b/unstable/build/alpine-x86/Dockerfile
index cf99ed5a..c3ff6012 100644
--- a/unstable/build/alpine-x86/Dockerfile
+++ b/unstable/build/alpine-x86/Dockerfile
@@ -22,6 +22,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     Windows and Linux."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # NOTE: This version was different than the base `gcc` pkg when last checked
 ENV APK_GCC_MINGW64_VERSION="12.2.0-r3"
 
diff --git a/unstable/build/release/Dockerfile b/unstable/build/release/Dockerfile
index 5d5bbdbd..5f17f594 100644
--- a/unstable/build/release/Dockerfile
+++ b/unstable/build/release/Dockerfile
@@ -21,6 +21,12 @@ LABEL org.opencontainers.image.description="Docker container image used to build
     golang:rc image or if not recently available, the latest stable golang image."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 ENV APT_BSDMAINUTILS_VERSION="12.1.8"
 ENV APT_TREE_VERSION="2.1.0-1"
 ENV XZ_UTILS_VERSION="5.4.1-0.2"
diff --git a/unstable/combined/Dockerfile b/unstable/combined/Dockerfile
index ffa13436..a8c181d4 100644
--- a/unstable/combined/Dockerfile
+++ b/unstable/combined/Dockerfile
@@ -9,6 +9,12 @@
 
 FROM golang:1.21.0-bookworm as builder
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # A current dev branch build (mirrored to fork) is used for pre-release Go
 # versions, otherwise the latest upstream build of the tool is installed in
 # this image.
@@ -70,6 +76,12 @@ LABEL org.opencontainers.image.description="Docker container image used to lint,
     golang:rc image or if not recently available, the latest stable golang image."
 LABEL org.opencontainers.image.authors="Adam Chalkley (github.com/atc0005)"
 
+# Explicitly disable automatic fetching of Go toolchains newer than the
+# version explicitly provided by this container image.
+#
+# https://github.com/atc0005/go-ci/issues/1188
+ENV GOTOOLCHAIN="local"
+
 # A current dev branch build (mirrored to fork) is used for pre-release Go
 # versions, otherwise the latest upstream build of the tool is installed in
 # this image.