diff --git a/ci/release/_install.sh b/ci/release/_install.sh
index d00a9c330..3db966133 100755
--- a/ci/release/_install.sh
+++ b/ci/release/_install.sh
@@ -185,12 +185,22 @@ install() {
   if ! echo "$PATH" | grep -qF "$PREFIX/bin"; then
     logcat >&2 <<EOF
 Extend your path to use d2:
-  PATH=$PREFIX/bin:\$PATH
+  export PATH=$PREFIX/bin:\$PATH
 Then run:
   d2 --help
 EOF
   else
-    log "You may now run d2 --help"
+    log "You may run d2 --help"
+  fi
+  if ! manpath | grep -qF "$PREFIX/share/man"; then
+    logcat >&2 <<EOF
+Extend your \$MANPATH to view d2's manpages:
+  export MANPATH=$PREFIX/share/man\${MANPATH+:\$MANPATH}
+Then run:
+  man d2
+EOF
+  else
+    log "You may run man d2 to view documentation."
   fi
 }
 
diff --git a/ci/release/gen_install.sh b/ci/release/gen_install.sh
index 1931d9029..de8f37431 100755
--- a/ci/release/gen_install.sh
+++ b/ci/release/gen_install.sh
@@ -3,6 +3,7 @@ set -eu
 cd -- "$(dirname "$0")/../.."
 . ./ci/sub/lib.sh
 
+chmod +w ./install.sh
 cat >./install.sh <<EOF
 #!/bin/sh
 set -eu
@@ -35,3 +36,4 @@ sh_c cat \
   \| sed "-e'/^\. /d'" \>\> ./install.sh
 sh_c cat ./ci/release/_install.sh \
   \| sed -n "'/cd -- \"\$(dirname/,/cd -/!p'" \>\> install.sh
+chmod -w install.sh
diff --git a/ci/release/template/scripts/install.sh b/ci/release/template/scripts/install.sh
index 454cbca98..4b4ae2d08 100755
--- a/ci/release/template/scripts/install.sh
+++ b/ci/release/template/scripts/install.sh
@@ -9,7 +9,8 @@ main() {
     return 1
   fi
 
-  sh_c mkdir -p "$PREFIX"
+  sh_c mkdir -p "$PREFIX/bin"
+  sh_c mkdir -p "$PREFIX/share/man/man1"
   sh_c install ./bin/d2 "$PREFIX/bin/d2"
   sh_c install ./man/d2.1 "$PREFIX/share/man/man1"
 }
diff --git a/ci/sub b/ci/sub
index 9efc8337b..db0f04530 160000
--- a/ci/sub
+++ b/ci/sub
@@ -1 +1 @@
-Subproject commit 9efc8337b86eaebf0fbc9b4c2202f1bdcf156a7d
+Subproject commit db0f045304ba1d69b85043d02c76891b75be6f0e
diff --git a/install.sh b/install.sh
index e32450f48..77a8f8151 100755
--- a/install.sh
+++ b/install.sh
@@ -423,6 +423,16 @@ arch() {
 gh_repo() {
   gh repo view --json nameWithOwner --template '{{ .nameWithOwner }}'
 }
+
+manpath() {
+  if command -v manpath >/dev/null; then
+    command manpath
+  elif man -w 2>/dev/null; then
+    man -w
+  else
+    echo "${MANPATH-}"
+  fi
+}
 #!/bin/sh
 set -eu
 
@@ -605,12 +615,22 @@ install() {
   if ! echo "$PATH" | grep -qF "$PREFIX/bin"; then
     logcat >&2 <<EOF
 Extend your path to use d2:
-  PATH=$PREFIX/bin:\$PATH
+  export PATH=$PREFIX/bin:\$PATH
 Then run:
   d2 --help
 EOF
   else
-    log "You may now run d2 --help"
+    log "You may run d2 --help"
+  fi
+  if ! manpath | grep -qF "$PREFIX/share/man"; then
+    logcat >&2 <<EOF
+Extend your \$MANPATH to view d2's manpages:
+  export MANPATH=$PREFIX/share/man\${MANPATH+:\$MANPATH}
+Then run:
+  man d2
+EOF
+  else
+    log "You may run man d2 to view documentation."
   fi
 }